What kind of power needed for Martin Logans?

This question has been asked in one form or another, but this time I need some specific advice. I listened to a Martin Logan home theater set-up the other day and I'm in love. I am willing to add or change anything to get these speakers into my system. Electronics right now are a B&K Ref-30 pre-pro, Sony 9000ES DVD, and 5ch Acurus 125x5. The Acurus is gone, I know that, but now I have to replace it with something. I have a Bryston 4B-ST that I use for my 2ch system. I can move that over to the home theater and add to it. My home theater room is small, so I will not be buying the gargantuan Martin Logans. A nice set of the smaller ones ($1000-5000 range) will do nicely. So let me have it. Do I go five channel amp? mix and match 2 and 3 channels? monoblocks? Brands? I'd like to keep the amp purchase down to a reasonable number ($2000-$5000). Any advice would be appreaciated, especially from people who are running Martin Logans now. Thanks.