Thanks for the comments. We REALLY love the house and just had the whole family here for the first Christmas at what my son now calls the "Texas Nexus".
The XT32 is pretty amazing. I don't know how much of the sound improvement is the processing or the hardware upgrade itself. All I know is, it works well. Very impressed from the detail and transparancy in the high end, to the improvement in the imaging and the bass extension and control. I spent a LOT of time learning REW and purchasing a BFD, calibrated mic, pre-amp, etc to tame just the sub itself with the old B&K. The XT32 handling the whole range of frequencies is doing a MUCH better job as testified by all witnesses so far. My wife can be extremely hard to please on sonics. Ears like a freaking bat. She gave me two thumbs up upon first hearing this, which is highly unusual. Normally it will take significant tweaking after a change to get it back to her discerning requirements of performance. I need to RTA it again now and see what the curve looks like. Very curious on that.
I find it amazing the XT32 isn't offered in the Marantz 7701 but is offered in units well down in the Denon and Onkyo lines. You have to go to the 8801 in Marantz to get it. It's supposedly higher-end equipment by the same company!
Also got another pair of posters for Christmas too. Laura Croft and Hallows. Also about a hundred BR movies which were well coordinated by my awesome wifer among relatives. My daughter evidently caught the $4 BR sale on Amazon and bought everything she thought I would like. Going to be a long time until I run out of software!
A really great A/V Christmas.