Do you do DIY? Do you like tubes?
I have Acurus RL-11, Adcom GP750, and rotel RC-1090 hook to the RB-1080 and, to me, the RC1090 is a clear winner in every aspect.
RC-1090 is a great mid-price pre, which produces pleasant sound at $1K, and it will not break your bank though. Also, I tend to keep pre & amp from the same manufacture. Please dont ask me why, the look ? Maybe.