Got my hands on the SE today. I've got a problem with LFE integration. I was able to apply a 10db boost between my pre and the player to calibrate with the 83. I've had to apply 19db plus increase my gain on the sub for the SE. I've been in touch with Oppo and they are in a quandary about this too. They did a test before they called back and the boost should have been even. I'm going to play with mine for a week or so. If I can't fix this, then they'll do a swap out. Nice folks.
That said, I'm fine now, but the sub doesn't seem as profound, just cleaner. All the rest of the channels are markably more detailed, airy and tone/tuneful. I've just been playing some MCH and a BR, along with the AIX calibration disk to get things to sound right. I've got a rough calibration now. I'm plugging in the Luxman pre for some 2 channel listening later.
First blush, definitely an upgrade. The detail in the surround channels with the new DACs is very noticeable, along with the front 3 integration. Just played Steely Dan's Everything Must Go DVD A, a favorite. Sounds like a speaker upgrade.