thanks dave!

I don't like the overclocking thing...I just would buy the processor and then leave it "as-is"...
the 4400 looks to be the best value...

What about the memory thing...for the 4400 X2 I am probably going to get soon, should I get
1.) 4 x 512MB DIMMs or
2.) 2 x 1024MB DIMMs or
3.) 4 x 1024MB DIMMs (which is really expensive - like $500. more than 2 x 1024! Is it worth the price?).

Does it really matter about having 2 or 4 DIMMs?

Also I have never heard of a 15,000 rpm Hard Drive - does this even exist? I have only heard of the 10,000 rpm Raptors...

Thanks,