Njedpx3, you have listed the wrong Yamaha amp series.
The P2500S (lowest powered Yamaha) is about $400 shipped. 250 x 2, 8 Ohms, both channels driven, 20Hz-20,000Hz. 310x2, 4 Ohms, both channels driven, 20Hz-20,000Hz. According to power level needed, there is the P3500S, P5000s and P7000s(700x2, 8Ohms, 950x2, 4 Ohms). Unlike most pro amps, the Yamahas listed do not have any fan noise and the pro rack mount ears are removable for use in regular consumer audio racks.
-Chris