> I am looking at satellite radios and was wondering if anyone
> has had any experiences with Sirius or XM Radio? I'm a
> little hesitent to buy, but terrestrial radio is getting
> really lously to listen to.
I actually have both, and they are very different services, despite what their hype may have you believe.
It all comes down to what you want to listen to. Sirius has a split personality disorder in that they are very heavily skewed to a younger audience for their music programming and an older audience for their information programming. On the music side, if you like youth-oriented dance and rock, you'll wallow in it on Sirius. I'm actually disappointed by Sirius' music offerings because they don't take advantage of the nichecasting that satellite radio can offer. Having well over a dozen channels devoted to dance and rock variations seems overkill to me, especially when they have no channels devoted to things like instrumental easy listening, new age, etc.
On the information side, they have the all-news BBC World Service stream, plus World Radio Network (for the shortwave stations we listened to before we all got computers and put the radio away), and now authentic Canadian programming from the CBC. They also have a real public radio service from NPR and PRI/MPR (XM invented their own). Uniquely, Sirius has a time delayed feed of BBC Radio 1 that is time matched to the eastern time zone so the time checks are accurate.
Sirius has Howard Stern in a few weeks, but they don't have MSNBC and are throwing Fox off their service for being naughty to them over some incident involving Stephanie Miller's show ending up on Alan Colmes' timeslot for two nights, which erupted into World War 3. They also don't have Air America, but they do have the Jones' libtalk programs.
Audio quality wise - Sirius sounds worse to me because of their CODEC, but that's at home with headphones on. In the car or for ambient audio, you'll probably never notice it. One major downside for Sirius is that their satellites are not geostationary - they are constantly moving across the sky and your reception quality, especially at home, will depend on what satellite is available to you at the time, and how strong a signal it is capable of providing to your receiver. In the car, this will not be an issue, but there are a few hours at home when Sirius is simply not available to me because of no satellite reception. I am hoping they will invent a wireless repeater that would allow me to install the antenna at a favorable location for all day reception and retransmit the Sirius digital signal to my receiver inside the home so I can have better reception.
XM's musical programming takes full advantage of niche formatting. You'll find a beautiful music station that sounds like it's from an era when that format was king. They also have an aforementioned new age channel, along with a decades-formatted pop music channel series (40's, 50's, 60's, 70's, 80's and 90's), plus a variety of flavors for jazz, classical, international, country, etc. There are a series of "alternative" channels all named after characters from I Love Lucy (incomprehensible reasoning at work, and I'm sure is lost on most listeners), and even some experimental stuff.
XM's target seems to be 25-54, whereas Sirius seems to be more 18-40ish when you add all their channels up.
For talk programming, XM has feeds of all three major cable news networks, plus C-SPAN Radio, the BBC News & Entertainment stream, their own invented "public radio" channel with Bob Edwards, and Air America Radio. XM is also launching an exclusive 24 hour Fox News Radio channel early next year if your politics go the other way. XM's talk channels seem to be more their own creation than Sirius who inked deals early on with the various public radio networks and international broadcasters. But they cover the bases in this area with one major exception - Canadian content. Now that both satellite services have begun service to Canada, Sirius signed deals with CBC and major commercial radio companies to launch 10 Canadian channels. XM's efforts, thus far, say "designed to meet the bare minimum requirements imposed by the CRTC" all over it. Their news/talk channels from Canada consist of a comedy channel (the third channel for XM in the comedy genre, and instantly duplicative) and two horrible channels for current events that consist of two announcers doing the equivalent of a radio reading service for the visually impaired. It's also woefully out of date.
Audio quality for XM's channels is better for music than Sirius (with the reservations I noted above), but XM has two problems:
1) Someone needs to train these people about volume continuity. During talk radio network break local avails, XM inserts their own PSAs, promotional spots, etc. (which you will grow to hate) at a volume that is much louder than the network material. Be ready with the volume knob.
2) Their low-bitrate traffic channels (and the abused Canadian news/info content channels) use a CODEC that is so bad, you'll want to throw flotation cushions and ropes into the nearest body of water to pull those announcers to safety. Everyone sounds underwater and women's voices, in particular, are barely intelligible. You'll be fully informed about how to do a water rescue by listening to XM Emergency 24/7 on channel 247, which this month is featuring in-depth tips about how to cross frozen bodies of water and rescue people that fall through the ice.
XM's reception, in home, is far superior to Sirius. In the car, I can receive either the direct satellite feed or, from certain locations, the terrestrial repeaters which are usually perched on cellular towers. Sirius has some of these as well. Learning where these repeaters are is extremely difficult, as they don't appear to show on any FCC maps.
Overall, I chose XM for my car and honestly spend more time with XM than Sirius because it better matches my needs. I'm irritated XM doesn't have stuff like CBC Radio One, but it's still a better fit for me.
Others seem more drawn to Sirius for their wide variety of public radio channels, or they like the dozen rock/dance channels.
You'll simply need to figure out which service offers a better fit. Both offer streams to preview on their websites.
One thing I can say, it's WORLD'S better than anything commercial radio in Rochester has to offer. The only reason I use my AM dial now would be to hear some local shows on WXXI-AM, traffic information, or updates on some breaking local news story on WHAM-AM. I have no reason to listen to anything on FM at all, unless I can grab CBC's high powered Kingston relay on 107.5 in the summer.