Always glad to help. Just a note as have never heard the MC601 within my system so am not sure how 'good' my data will be vis-a-vis MC601 versus MC611. For me, attractions to this amp was the usual great Mc stuff plus quad balanced and they enhanced the power supply / 2.8dB dynamic headroom.
Plus, yeah, ok, it was time to finally have a McIntosh amp in the house. (Smile, and bit of a giggle) A pair of 600W beasts solved that

And yes, the wife loves loves loves them. So even if i didn't commit to them originally, there's no way they're leaving the house now that she's heard them. Happy wife, happy life.