Watch the impedance of the speakers. I have a C2300 and MC275 and the combo sounded great with my Quad 2805. But when I got Martin Logan Spires, which can dip to below 2 Ohm, the MC275 could no longer keep up and sounded rolled off in the treble and the bass was loose. A MC402 now powers the Spires.
What Speakers
I just bought McIntosh pre amp C 220 and two McIntosh MC 275 what speakers would sound the best im very green at this