First of all, stop picking on the guy for spending so much money, sounds like you guys are pretty damn jealous. Also, keep in mind if he's spending 4 grand on a PC, you can stop telling him he should be spending it on other things, because common sense says if he's spending that much on a PC of all things, he probably already has a nice car etc etc. I'm going to be spending about that much on a PC in the next few months but I'm sure not gonna come here asking for advice now.
Anyway, to the OP, don't buy a 1000w+ PSU, there is absolutely 100% NO benefit in doing that, it's just a waste. Most of these configs you listed could be run just fine on a 550w PSU, go for a 750W at most, don't buy into the whole giant PSU hype. The 550W I have can power a pair of quad cores, 8 sticks of RAM, a pair of 8800gt's, and 2 hard drives without breaking a sweat.
Now in your position, I would go for a Q6600, and a nice overclocking board, and some water cooling. If you must have a 45nm CPU, I'd wait till early next year when the rest of the line comes out, paying $1,300+ for a CPU is ridiculous, especially for a gaming PC, where the CPU isn't even the bottleneck.
For RAM, don't waste money on DDR 3, there is no benefit to that, unless you're doing extreme OCing, like LN2, which I doubt you will be. DDR 1066 RAM will get you to 2132FSB, I doubt you'll be getting anywhere near that.
I would put a lot of that money towards a nice big monitor and a big comfy chair if you don't already have one. Which are you going to notice more, a CPU that's a few % faster, or a big ass monitor?