I would recommend getting the M80ti's. I have my sound system in a very large room (about 60x20x9 feet), and the M80's create a very nice soundstage. I am using a Denon 3805, but would eventually like to get something like the Earthquake Cinénova Grande Seven-Channel Amplifier (300wpc!).

4 M80s/VP150/EP600/Denon AVR-5308 & DVD-2910/
2 QSC SRA3622(1100wattsX2)/Carvin 1800HD(600wattsX2)