I have the Anthem Jaybo mentioned and am really pleased with it. It's like a Naim for tunefulness but it also has modern sonic virtues in terms of detail and separation. Gobs of power, also. Otherwise I might consider the Naim XS or investigate what Class D integrateds fit that price range. Perhaps even the Channel Island monoblocks which are tiny and can save you on speaker cable and be placed nearer each speaker.
Something that will more bearing on bass response if of course speaker placement, the stands, and your room.
Something that will more bearing on bass response if of course speaker placement, the stands, and your room.