Budget range would be helpful...
Looked them up any fedback?
$500 gets you a nice machine with fixed clamps and a multi-point mounting system. Alpha, Silent Partner, Mutual Power, Gamma. Lots of threads re: people going through the same process.
Most of the people (more than 5) that I know use Klippermate stringing machine. It's not terribly expensive and for most racquets, it does a decent job of stringing (except for Head Ti.S7). I also use a Klippermate.
i'm pretty sure most people here are going to tell you to save a few bucks to get the REVO it seems like a pretty perfect machine for what your going to be using it for/wanting to spend on it.... btw I have a spot in line for one that I wont be needing anymore... its up for grabs and should be ready in like a week or so... who wants it??!?!