I'm in the middle of rebuilding my home theater from the speakers inward. While I've been listening to speakers, I've been trying to assemble a large number of specs on amplifiers and I'd like to get some folks impressions on what stats mean what to them and which are most important. In other words, does the damping factor mean anything? How about the size of the toroidal transformer? etc. I realize that listening to the amp is the ultimate test, but I doubt this will be possible in all cases (I'm considering some used Citations, so I doubt I'll get a chance to listen to them). The speakers I'm currently considering are: Vandersteens, Magnepans, and Martin Logans. I'm looking at a 7.1 system, but I'm not sold on a 7 ch. amp that I can afford; I've been considering alot of 5 and 2 channel combinations. Thanks for your help!