Budget PC build

APPROXIMATE PURCHASE DATE: Asap
BUDGET RANGE: $400-500 US
SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Gaming (World of Warcraft with a sweet UI, maybe some SF4, and Starcraft 2 if it ever comes out), some photoshopping, and idiotproof web browsing for my little cousin
PARTS NOT REQUIRED: Keyboard, Mouse, Monitor, Case
PREFERRED WEBSITE(S) FOR PARTS: I would prefer newegg.com, but am open to other reputable sites.
PARTS PREFERENCES: Nice quality parts I won't have to worry about for a few years
OVERCLOCKING: Maybe?
SLI OR CROSSFIRE: No
MONITOR RESOLUTION: 1600 x 1280, I may upgrade to a new monitor some time if/when my A90 dies on me.
ADDITIONAL COMMENTS: I <3 this forum

Found a nice combo on newegg I think I could use as a starting point. I'm liking the reviews I'm reading on both the CPU and mobo (AMD Phenom II X2 545 Callisto 3.0GHz and GIGABYTE GA-MA785G-UD3H) http://www.newegg.com/Product/Comb [...] bo.254097]
And possibly this video card SAPPHIRE 279L Radeon HD 4870 http://www.newegg.com/Product/Prod [...] 814102850]

Not too bad for the build in the 2nd post, however, I personally would not get the Cooler Master case. It's not that I'm saying it's a bad case, but it appears to be 45 bucks. If it were me, I'd grab something cheaper, maybe this for example.

Only 25, rated ok
http://www.newegg.com/Product/Prod [...] 6811147073

Here's another at the same price

http://www.newegg.com/Product/Prod [...] 6811147109

You get the idea. Take something like that, don't really like paying 70 bucks on that hard drive.

Here's one for 57.

http://www.newegg.com/Product/Prod [...] 6822136073

Haven't used that particular drive, but seems rated very highly, others here may have more information.

Also, the 4650 seems to run about 50 bucks give or take.

Maybe pick this up at 55, send in the 20 dollar rebate.

http://www.newegg.com/Product/Prod [...] 6814121320

Counting the rebate, we've saved 53 bucks.

Grab this chip and dump the 250.

Or, if you like the cooler master case, there's actually this combo with the same cpu on special.

http://www.newegg.com/Product/Comb [...] mbo.244566

So realistically your cost with these changes should stay around the 500, but I'm thinking it would do a lot better with your games. And the black edition should allow more OC headroom should you decide to do that.

Ah, my mistake for not reading more thoroughly. In that case, you may even be able to pick up a 4850 if you stretch the budget a little. Which I would recommend due to your resolution.

Yeah, I didn't read everything and didn't realize you already had the case. If you've got the old case, save the $$, that's the way I am as well.

Thanks for the suggestions! I'm leaning towards Outlander_04's build, maybe with a better GPU.