Hi Lee

It's not just the inclusion of upsampling the rears, the 568.2 (and mm version) are a marked step up in sound quality from the 568.1. I've owned both, used with DSPs, and the difference was very obvious. I think the 568.2mm is a real audiophile bargain these days, and it cuts the mustard as a digital preamp in analogue systems too until you get into stratospheric dCS money.

Worth the upgrade!

Cheers

George