Hi Scuffer... I got a pair of Outlaw mono's to replace the 3805's amp sections and I couldn't be happier. Cleaner output at higher volumes. I've had them for about a year, and have had no issues. I live in a single family home alone (for now)... so I can go nuts with volume levels when I choose to...well, especially after a few drinks with friends over! The amps always handle what I throw at them ... no shutdowns to date. They'll get hot when I push 'em, but they apparently can take it. I'd make sure they have descent ventilation.
The only recommendation I would make with the M80's is to make sure you set your crossover to 60 or 80hz when pumping the amps at high volumes (assuming you have a sub).
I had the M80's set to large when playing at high levels (about 110 db's at 12 feet) and heard the woofers overdriving on 2 different occasions (it's a POP-ing sound...NOT fun to hear).
Using the crossover, however, took care of it.