I'm currently using an Outlaw model 755 power amplifier to drive my setup: M80Ti x 2, VP150 x 1, QS8 x 2. Specs are 200x5 into 8 ohms, 300x5 into 4 ohms. I think it drives my system very well, especially at higher volume levels. Outlaw also makes a larger amp, the 770, which as the same specs but 7 channels. Unfortunately they do not make 2 or 3 channel amps.