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!

*** -all the price difference is absurd. I've already considered two 4890 but this isn't a purely gaming rig, and CUDA/PHYSX will be extremely handy, plus it's only 20-30 USD difference for 275 SLI or 4890 CF, and I like SLI better.
Seagate are awesome, what's wrong with you?

All I wanted to know was the cooling temps and the PSU strength anyway. I got the response on another thread I made, so thank you.