Hi, I have a Rotel RA-1520 amp, with Rega RS3s, and I love it. But, I want a surround system. Would I be sacrificing too much by replacing the Rotel with something like the Yamaha A1010? I can't justify both, either in terms of cost or aesthetics. Speakers to provide the surround will have to be my old Diamonds for now, but more aprropriate suggestions would be welcome. The Rega centre seems too deep to me.