eVGA has a much better customer service, and I always get my returns in a few days (next day, now that I live right down the street from them), and I always use their cross-shipping for $10-15 (can't remember now). Asus is good, but they're just average for CS. Not horrible at all. Just average. As for Skt775, eVGA used nVIDIA chipsets, but for LGA1366, they use Intel chipsets, so the comparison of a 7X0i chipset to a X48 chipset is null here, as both the Asus and eVGA boards use X58. And eVGA is a little better at releasing new BIOS updates on a timely manner. But I love my Asus P6T-Deluxe.
Also, I'd like to say about your "eVGA" comment about FSB, it was not eVGA, but the nVIDIA chipset. I have an eVGA 680i. Sure, it has a lot of FSB holes, but I got to know them, and could push PAST them. I got my old E6400 to 3.733GHz 90% stable on it (it would crash about once every 2 weeks). eVGA did good work, pushing out BIOS updates for my 680i when quad-cores came out.
As for my GA-EP45-UD3P, I haven't really pushed it because it's running a Hackintosh right now, so I don't have any temp monitor software that will work in Mac OS X. But right now it's at 3.33GHz so I can't really complain. It's a stable board but I really got it because it is 99% compatible with Mac OS X with current hack kits. Maybe someday I'll put a Windows OS on it and see how far I can push it. All I can say is, it's much better than my old 975X board.