Anyone have any advice as to if this is a high quality amplifier? I have a yamaha receiver that has the main in and pre-outs and thought maybe I'd get a little cleaner sound out of a seperate amp and using the yammi as the pre. I can get one of the Sonance amps for a steal being a dealer, but I dont know much about this specific product. Does anyone own one of these amps? Thanks for any advice. -audioman