I (and several others) have the Pod x3 Live, and I love it. Full control of each channel, wide variety of output options, programmable at your computer (this is an exceedingly helpful feature). From this I'd imagine the pro would probably work well for you--though you'd probably want a decent multi-function footswitch.
Also, there's some buzz about the new Line 6 x3 Live HD models coming out--and I think they're coming out soon. Might be worth waiting a bit to see what they're like. Of course, if you're sold on a rackmount unit, what you're looking at may be just fine.
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)