Shady, the 4810 will run your M80s to levels you won't be able to listen to for long. I run my M80s with a 3808 as do many on this forum and non of us have problems. I even ran my M80s with a lowly 1804 and it could hit ~100db and not shut down. Denon is one of the manufacturers Axiom recommends to be paired with the M80s. So if you want the 4810 then by all means get it, it looks to be a very nice AVR.
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Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70