I agree that a much more powerful amp is of benefit with the M80's, although most of the Denon's, HK's and even the 94TXH can probably handle them reasonably well, it's nice to have the extra power available.

I have the 3808 but use an ATI-1506 in bridged mode for the front 3 channels. In bridged mode the ATI is rated at 450 watts per channel X 3 into 8 ohms. Me Likey! \:\)

2xM80 VP180 2xQS8 2xM3 HSU STF3 LG 60PS11 Denon 3808 ATI 1506 LCR 2xATI 1502 Oppo BDP-83