Price limitations: Around $600 preferred to pay, but $900 at the very most!

Right now, I'm posting from my 1.5Ghz PowerPC G4 Mac Mini. It has been great. I love the little thing, but I really desire more power. I could buy a new Intel Mac Mini, but I'm not too happy with integrated graphics. I really want more power. I could buy an iMac, but I really don't need another screen. I could just as well reuse the Apple 20" display that I'm using now. A Mac Pro is simply out of the question, too expensive!!

So, with that said, I've decided to build myself a hackintosh. All I need is the tower, I plan on reusing all of my peripherals. Don't fret about the mini, it'll become my new server. (it'll be replacing the VIA 800Mhz mini-itx linux server that I already have in place. I think I'll give the mini-itx machine to my brother..)

I basically took the plans for this hackintosh from:
http://www.istuffmake.com/2007/11/19/35/

and here is what I've assembled in my wishlist so far:


The case is very Apple-esque, its inexpensive, and comes with a PSU. I hear the mobo is great for hackintoshes. 4GB's of ram is preferred, and I'm undecided on the video card. I want a video card good enough to play games. I fully intend to use Boot Camp virtualization to get linux or windows on it.

I don't need top of the line graphics, I just want a video card that'll do games on steam. (Like Team Fortress 2 on a reasonable graphical setting).

Please, give me some suggestions. Feel free to force upon changes. I really do want the best for my price range.

EDIT: I also have spare sata harddrives and a DVD burner laying around, so don't worry about them.