+1
My "wheelhouse" in music is bass/midbass and a warmer midrange. I have auditioned many amps/integrateds and I have not heard an amp that betters the MC611s in the bass/midbass range. The closest I heard was the Gryphon Diablo 300. I think the big MACs have it beat, though.
As far as highs, McIntosh is a little "light" on the top end. I fixed that problem by pairing my source DAC into the C2700 with Nordost Valhalla 2s. That cable has completely transformed the sound of the system.