I used a lower end Oppo with a Parasound P7 very successfully. May have been the best HT sound I've ever had at the end of the day.
The P7 had 7.1 inputs and outputs, allowing you to use it as both a stereo preamp and HT control center. Also, AFAIK it had the best analog section of any Parasound preamp below the JC line.
The only negative is really the lack of DSP correction, especially for the subwoofer. Something you can fix quite easily with a miniDSP.