My New Cheap Game Build...Good Enough?

I've been lurking here for a couple weeks, getting lots of info and what not.

This is my first computer build. I will be using it for Diablo 3 when it comes out...though by that time, it'll be obsolete  
I might play some other games on it as well, but nothing beyond what Starcraft 2 requires (for now). I'll also be doing some photo editing and the usual web surfing. I'll be purchasing this within the week.

My budget is less than $600. I have a monitor (el-cheapo LCD), keyboard, mouse.

I'm not interested in overclocking or anything like that. Heck, if I am able to get this thing running, I'll be thrilled! I'm upgrading from an Athlon 64 3000+ 1.8 Ghz processor and who knows what else is inside this HP piece-o-poo.

I live in the U.S.A.

Here it is, all from NewEgg. Please keep in mind that I was attempting to get the most from Combo Deals while still getting what I felt was the most "bang for my buck". Feel free to tell me what you'd do differently, and why.

CPU: Athlon 2 X3 445 Rana

Motherboard: Asus MicroATX 785G

Case: NTXT

Graphics Card: Asus Radeon HD 4870

PSU: OCZ 600W

RAM: Patriot Series 5 (couldn't pass up the price)

Hard Drive: Hitachi 1TB

DVD Burner: Asus

I intend to install Windows 7 Home Premium, 64 bit. I also intend to mount one more fan on the case.

Some of my thoughts/reasoning as to why I chose what I did:
1) Money: Tried to get the most bang for my buck by taking advantage of the combo deals and/or rebates and/or promotions.
2) I liked the looks of the case, and it seemed sturdier than others.
3) Hard Drive: $60 for a 1GB drive? Couldn't pass it up.
4) PSU: Figured 600 W would be more than enough, based on what I read around here.
5) Motherboard: I like Asus, I like the integrated video feature.
6) Video Card: Was going to get the HD 4850, based on what I read on this site, but found the above for about the same price. Figured it was a bit more oomph?

Thanks for looking, and fire away!