Sean, my thought would be to simply use EZSet on your 7200, which would likely be at least as accurate as any manual attempts with special discs and a SPL meter.

Thanks guys. Tomorrow I'll play around with things. I've got a tube preamp I want to stick in the mix (just realized it has HT bypass), but I am so full right now from Thanksgiving that there is no way I'm going to be able to crawl behind my equipment and switch cables. Once in tomorrow, I'll recalibrate everything

I don't even want to tell you guys how many dumb things I did today while trying to integrate my tube preamp into the HT mix, but I finally got it figured out. May I remind you that I scored dismally low on the mechanical aptitude test, and today was a reminder why. . .

In any case, good news, I ran the test tones through the analog inputs and everything is fine. Checked both DD and DTS and both come out even across all speakers. I don't know why I was getting different results before. . .well, read the above paragraph. User error more than likely. . .