Need help considering a PSU and a CPU cooler

Hello there! I have asked this on another forum, but got no answer. I'm sure that I'll get a proper answer here.

Here is a build that I'm planning, I'm not asking for changes, just want to make sure everything will work:

Case: CoolerMaster HAF 932

PSU: Corsair TX750W

Motherboard: Gigabyte GA-EX58-UD3R

CPU: Intel Core i7 920 D0 Stepping

CPU Cooler: Scythe Mugen 2

GPU: Two ASUS GTX 275 cards in SLI

RAM: OCZ GOLD DDR3 TRIPLE CHANNEL 3GB 1600MHz CL8

Sound Card: Creative SoundBlaster Audigy Value

Hard Drive: 500GB Seagate SATA II 32MB Cache

Optical Drive: Samsung 22X SATA II DVD R/DL Burner


Questions - will this CPU cooler along with the case, etc. hold the i7 920 at 3.8Ghz, at a stable and relatively cool phase?
Will this power supply be enough for all of the components at load?

Thanks in advance!

Oh, why mugen 2? Why not take core contact freezer? also, two 4890 would be cheaper. And it only 11 days till 5870 is released. It's supposed to outtake 295 and is 100$ cheaper. Also dont take seagate, pick samsung f3, they're faster and quiter. the rest is ok. oops, forgot. You might consider taking i7 860, it's faster and boards are quite cheaper.