Well, my rig is up and running and is very nice. I ended up buying the parts from Microcenter and the prices were pretty good. I ended up with:
E8400 - $150
ga-ep45-ud3p - $145
OCZ 4GB PC-6400 DDR2 - $48
Dark Knight - $60
I definitely over-payed for the Dark Knight, but I thought the CPU/Mobo were pretty reasonable ($20 rebate on mobo, and the CPU overclocks well). I had a bad experience trying to get this stuff from NewEgg, so I canceled the order and bought this stuff from Microcenter all in the same day
I'm probably going to return the RAM and buy some that I can overclock a bit more with.
You guys were right about Vista-64, everything just works. I had my browser and e-mail client up with all of my settings etc (I just copied the profiles from the XP drive over and the mozilla apps worked great). iTunes is working great. I still have just a few things left to bring over.
I think I want to get a GTX 285 video card, but I want to see if the prices will come down.