Voice Hosting

We're having some trouble with our Team Speak 3 server staying up. I'm going to relocate/re-install the server regardless, but if you'd like to try a different VoIP, I'm game. The other options are Ventrilo and Mumble. Vent is popular and well known and Mumble is just plain a good, low-demand/ping VoIP. I like the latter, but looking for your opinions.

I always had vent in my past and it was good. Never used mumble. Never had an issue when I did use Teamspeak until this one so it's probably a host issue. Not much help I guess because I'm good with any of them.