I'm not sure what the real differences are, would prefer the RX-CT990.

I have the 990, it's a great box.

Your spot on Bill. I have the DT-680 but want it's cousin without the CD.

Buuuummmmpppp....

I just recently got into these Panasonic models...last week i picked up a whole bunch and made a stack of 7 of them...for dirt cheap The sound on the bi-amped ones are GREAT!

-gsbadbmr