Scamp, the majority of the time you will only be using 1-3 watts to play pretty loud, with brief jumps "maybe" up to 100 watts or so. I am not going to quote what JohnK says about unused headroom as I'm sure he will be along soon. smile The M80's are rated at 95dB's (that is very loud) "in room" using 1 watt at a 1 meter distance. So even at normal distances back from the M80's your still only going to be using a few watts most of the time.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85