Count me in with the Vegas believers! I've used Pro Tools, Cool Edit (now Audition) and Vegas, and for what we do in radio, Vegas kicks ass! If you're making an album, then yeah, Pro Tools is where its at. If you want to save a hundred bucks or so, then get Audition.
Where do I start with Vegas? No file converting, drag a wav, mp3 and aiff file into the same track if you like, cross fade. No problem. No more real time bounces like in Pro Tools. Vegas utilizes a lot of Windows resources so it doesn't hog all of your processing power like Pro Tools proprietary interface does. (You can leave your email program on and not worry about crashes). The mouse and keyboard functions are windows based and very intuitive. Resize any window the way you like.
One of the coolest features is that you can have more than one instance of Vegas up at a time. Lets say you're working on a spot for a client and you need the disclaimer and music from a previous session. Just open Vegas again and copy from one session to the other. Major time saver!
AND its a video editor!
I could go on, but I won't. Just like nobody's going to tear me away from my Vegas, I'm not going to convert any Audition fans. It all boils down to what YOU like and are comfortable working with and with Vegas, Acid and Sound Forge I can create just about anything I can conceive and that's all that matters to me.
(I swear to god, Sony should be paying me!)