At that price and power range I don't think you are going to have many choices. Check out www.carvin.com. They make solid stuff at low direct to consumer prices. They have an HD1800 at $330 which puts 600 watts per channel into 4 ohms. More features, including some valuable ones like limiters, would jump you up o $530 in the DCM2000 at 700 watts per channel. I have been running 2 DCM2000's for several years, one driving some HSU subwoofs and the other a pair of AR-9's. They are very good amps in my experience. You can sometimes buy these on eBay for a little less, but not much and you don't get the warranty that way. While there, don't look at their LS2153 speaker system as the specs and price may disturb you. Dick