I'm curious to hear your impressions (you too ImcLoud). I'm starting to look at separate amplifiers, but unfortunately my current receiver has a little design flaw: it features pre-outs, but no main zone 12V trigger nor a switched outlet to plug an adapter into. As I'm not inclined to leave a power amp running idle 24/7 wasting electricity, and well...I'm lazy, I may look to replace the whole spiel.
Also curious to see if Emo is going to release a XPA-500. I don't necessarily need something as powerful (and large/heavy) as the XPA-5, but I don't foresee the UPA-500 representing a big upgrade from what I've got either.
Fun times!