$400 power supply? Wow.
If you're spending that kind of coin, get a bluray player. Don't go OEM or you'll play hell trying to get playback to work right... Go for a retail package with decent software and support.
For that matter, get vista ultimate instead of premium. Premium leaves out some stuff that would be nice to have I think... That's one reason I still haven't bought vista, their feature list forces me to get ultimate and it's expensive. But I didn't get a $400 PSU either
You won't find it at newegg, but you will want the thermalright ultra extreme "TRUE" heatsink for your cpu. Again it's not the cheapest but it's the best I've seen in dozens of reviews and it's only about $20 more than lesser heatsinks.