IP software is trial and error as you well know.Demo audio compass and skype.I still like POTS,hard to beat copper..Anyway you can get a wireless link to your local stadium(intranet)? Most anything would work and you wouldn't be a prisoner of the internet.But if you're dependent on your local inernet provider,you might consider the Comrex and Tieline units or even the new Barix 500,they're only a grand for a pair..LOts of choices and budget consideration.Good luck,you'll figure it out.