building a new pc

[jayrc]

Hi all, I need some help on some basic components like hard drive, power supply, OS, cd/dvd drive, etc.

I'm going to wait till cod is released to get the big stuff after we get some feedback, so far I have the case and the cpu cooler. I would like to get some of the other stuff now so I don't have to put out all the money at once.

my build:

amd phenom II x4 965
msi fuzion mobo (in case I want to add more cards)
8 gb corsair ram
corsair tx 750 psu
coolermaster cpu cooler 212
win 7 64 bit
gtx 580
coolermaster elite 430 case
wd 640gb hdd
msi combo dvd drive
lots of fans

1. I'm looking at the wd hard drives, can't decide weather to get the 32 or 64 mb cache, rpm? I'll have 8gb memory, is the hard drive that important with that much ram?

2. what size power supply for the gtx 580

3. do I need win 7 pro to be able to run IL2 1946, freetrack, windows enabler, or can I use win 7 home

4. can I use a combo dvd rom/dvd+r+rw or do I need two separate drives

Can't wait till this sim is released