From what I've read, the Pioneer doesn't handle 4ohm loads very well if at all. It's only rated by Pioneer themselves to handle 6ohm speakers. There's always the option of driving everything but the M80's off the Pioneer and getting a separate 2 channel amp to drive the M80's. The 74txvi plus two Outlaw M-block amps (link) would come to about $2100 MSRP. That would give you 300watts for each M80 and the rest of the power from the 74txvi to handle the remaining speakers.


M3's(LCR), Onix X-Sub, Marantz SR5200