Will you be running a sub? Would you be running 1,2 or even three pairs simultaneously? If you will be using a sub, a receiver with bass management would be preferable. The RS2150 WILL have bass management. An external speaker switcher will probably be needed as well, such as those offered by Niles. If radio is not a priority, than an integrated amp, as Gonk mentioned, is a possibility too. With that you could use a subs built-in crossover and make a loop.....from pre-outs of integrated amp to main-ins of the sub, then outs of sub to main-ins of integrated amp....taking the low frequency burden off the main amp and stereo pair of speakers. I ran my Vandersteens that way with my PSB subsonic 3 using a NAD preamp with Rotel amp. The sonic improvement was incredible. That was before I wanted a multi-channel digital surround setup.