I recently built a pair of AR.com (Ed Frias) speakers. I am powering them with a 2 channel Denon DRA 685 receiver. While they sound good, I believe they would sound better with improved electronics. Any recommendations for an integrated amp, or amp/pre-amp combo to run with these speakers (2 channel)? 300 to 500 dollar price range. BTW, the Denon can be used as a pre-amp, although I'm not sure of the quality of the pre-amp section.
Thanks