The OPPO's DAC's are not as high quality as the 990's, which is probably why the CD's sounded a bit thin. Try this combo for CD playback: configure the CD input to use the OPPO's digital audio connection (the same one that you assigned to DVD for watching movies on the OPPO), set the processing to "Upsample" and go to town. This way, you can have the OPPO set up with the DVD input (digital audio plus component) for watching DVD's, the CD input for listening to CD's with the 990's DAC's, and the 7.1 Direct input for DVD-Audio and SACD.