My Musical Fidelity HT600 5 channel amp powers my B&W 805's easily, and is an amazing match. It should drive the 804's with muscle to spare, and give you superb 2 channel sound as well. If you ever need more amplification, you can always buy their 2 channel amp for the left and rights, and keep the 5 channel for everything else, and still be way below the competitions prices. There are bigger and more expensive amps available, but I haven't heard a better sounding one yet.
Advice on 5ch amp to power Nautilus 804s
I am in the process of building a complete Nautilus home theater system. I just purchased the N804s for left/right and the HTM-1 for center, as they both share the exact same drivers. I plan to purchase another set of N804s for the rears in the future. This will produce a completely balanced speaker set. Now I have to power them. I am running a Acurus 125x5 amp right now, B&K Ref-30 and Sony DVP-S9000ES. My question is does this amp do these speakers any justice? What should I upgrade to? My room is small, 13x14, actually a bedroom that is now the home theater. I watch 70% movies, 30% music. I have, left over from a soon-to-be-dismantled audio system, a Bryston 4B-ST. I have toyed with the idea of purchasing a 6B-ST so that I can have 5 channels, but I think this might be overkill. I feel it might be more prudent to purchase a 9B-ST or possibly the 5ch Krell. I have no qualms about selling both the Acurus and the Bryston to help fund my purchase of another amp, so any ideas you all have would be appreaciated. Thanks.