Thanks for the reply. I was hoping I wouldn't have to pull and remount the Megahalems. One thing that Prolimatech didn't do was countersink the holes in the two bars ("strip adapters") that the main sink retention bar ("mounting plate") screws down into. The spring-loaded screws have to be dead-center on the holes in order to mate. It was a bit-of-an-itch trying to get them screwed down with the mobo out of the case. (yeah, of course I'd be lazy and try to remount it without gutting the whole thing...)
I can't say much about the i7-860 yet. I've only just gotten Win7-64 loaded along with the basics (Intel chipset, Intel Storage Matrix, VIA audio, ATI Catalyst) and wanted to run Prime95 for a day.
I'm surprised that even after a few hours, the Megahalems is still completely dead cool to the touch. I've got a Scythe S-Flex SFF21F on it, but no side cover on the case (drive cage/cable problem mentioned in other thread).