Dang....I go away for a little bit and here you guys go upgrading on me.
Gov, what Panny did you get?
Regarding 4 Ohm speakers with the SC series, I've stated before that I'm running 4-6 Ohm speakers all the way around in my HT (Rockets). I can't even begin to strain my SC 05, and I play mine...ummmm....dynamically.
Previous to the SC 05 I danced for a bit with an Onkyo 805, then an 875, and then a Marantz SR 8002. Comparatively, my speakers sent the 805 into protect mode pretty readily. Got a little better headroom from the 875, but it sounded harsh (clipping?) in doing so. The Marantz SR8002 came closest to the warm articulate sound of the SC 05, but Audyssey set up couldn't equal what I got from MCACC. And, I'd still say on a subjective basis, the SC 05 outmuscled the Marantz, too.
I was coming from an EMOTIVA LPA/UPA separates set up. I'd say the SC series is at least the equal of those separates....surpassing them in the features dept.
Of course, given a different room, with different speakers, the results would change.
Briefly, that's been my experience.