I have 802D4s that I bi-amp. I use two mono-blocked MC275s for the highs and the mids and at first had an MC302 dedicated to the lows. It did the work but not without the feeling that it while it did the it, it would rather spend its time knitting or pressing flowers. I now use Pass Labs xa160.8 monoblocks for the lows and when they're not eating road kill or give filterless cigarettes to kids they make the MC302 look like it failed out of clown school. The MC462 is an objectively better amp than the MC302, no question, but it's still playing minor league/Class A/B baseball in comparison to the effortlessness of the fully Class A Pass Labs.
I had initially decided to go with Mc 600w mono-blocks but hearing those even against the xa25.8's I knew immediately I wasn't getting the Mc monoblocks.