I also have the 755 and 990. I was in a bit of a quandary about what to do with 2-channel audio since I have a Monarchy DIP "jitter buster" that I like to use with my transport. So...as mentioned above, I used both the optical out (for DVDs) and the coax out (connected to the CD input on "upsample" for 2-channel stereo). It works great!

I haven't really been able to exercise the system yet since my Maggies are still in transit and my Dahlquist DQ-20i's are a bit long in the tooth. My initial impressions of the sound quality are favorable. It's not as good as the Adcom GFA-5802 that I had been using for 2-channel use, but then again, the 755 isn't nearly as expensive either.

My biggest problem seems to be seemlessly integrating the dual LFM-1's into the system without getting any boominess. But I suppose that can wait until the Maggies get here.

Finally, one last nitpick....the 990 is WAY too big. I have a pretty generous LOVAN rack system and it wouldn't fit. The 755 fits nicely.

Best regards,