I currently am using a HK AVR 320 for my preamp, and a HK 2.1 for my main amp in a 5.1 system. I don't like the 320, due to a problem it has with DTS, and it has no stereo bypass mode. Is there anything I can purchase as a receiver that could replace both? I would like to at least have DPLII, and possibly room eq. I have looked at the Yamaha rxv 657 I think is the model, and the some of the Pioneer models. Thanks, for any help.