Thanks everyone. Maritime, right now I have the Rotel RC-1580 preamp and the RB-1590 amp. I had the RB-1075. I don't think I have the experience to compare the RB-1590 amp to other higher-end amps. But I think I know good, clean, fast sound. I am very picky about how music should sound out of my B&W 804S speakers. The 1590 amp has been a big improvement, especially in bass response, depth and speed and a complete absence of audible signs of distortion at any level I care to listen to. It actually gives the 804s a little of a workout for a change. It has oodles of headroom, and I really like its transparency. I dont like warm sounding systems, but I do like range and linearity, and I feel I get that from my system so far. I would love some preamp recommendations, as that is probably next.