Caesar, welcome to AA!
Congrats on your purchase.

The 801 D4 is not extremely power hungry, but I don't think there is any AVR on the market that will do it full justice.
I'd keep my AVR for center and surrounds, and add a beefy stereo amp (or monoblocks) to feed the B&Ws properly.

Awesome speakers, Caesar!

I agree with the others--to really hear the B&Ws, you need to invest some serious coin in stereo or dual monoblock amplification. Plenty of choices in the $10-20K range from McIntosh, Bryston, Pass...

Denon makes very good consumer-grade AVRs (I have one), but you're in a very different area now. Good luck!