George,

Thanks for the input.

Just to recap ... I'm still a little unsure:

The audio output options are 2 ch - 44, 88, 176 and 48, 96, 192; 5.1 ch - 44, 88, 176 and 48, 96, 192; 7.1 ch - 44, 88, 176 and 48, 96, 192.

You're saying to turn off everything above AND below 96 khz? So, basically set a fixed output at 96 khz for each type of stereo or multichannel input? But then the HD621 won't be doing any of the upsampling, right? Doesn't it max out at 96 khz? Also, if the disc is 48 khz, the PS3 is set at 96 khz and doesn't upsample movies, will there be any output?

Regarding your experience with BD's, I bet most if not all of your lossless encoded discs are 5.1.

One last thing, you said the HD621 can only deal with 5.1. Isn't it actually 7.1 capable (4 x SPDIF), and the G68 (3 x SPDIF) is the one that's not?

Thanks again.