Phenom II x3 question about build

Hey Tom's community, I have a few questions on this build. I'm building a budget-esque gaming rig, that is cheap and future-proof to an extent with room for upgrades later on. Here's the build:

Antec 300 + Earthwatts 650w PSU - $119.54

G. Skill DDR3-1600, 2x 2GB + MSI OC gtx260 core216 - $224.98 After MiR

AMD Phenom II x3 720 + GIGABYTE GA-MA770T-UD3P AM3 AMD 770 ATX AMD Motherboard - $168.99 After MiR

$513.91 including MiR.

I was just wondering if there was anything else that I could improve on for the price-point. The only thing that I was really considering was the HD4870 1gb version/HD4890 1gb/gtx260 core 216. The combo was the thing that really put me over, as well as lots of reviews that I've seen saying that the HD4xxx series runs hot and loud. I'll be gaming a bit with World of Warcraft and Starcraft II, and possibly Diablo 3, but on a 24" 1920x1200 res. monitor. I don't need another hard drive, and I can salvage my dvd/cd burner out of my current build. I would like to purchase within the next two weeks, so any advice or knowledge on upcoming product release, etc. would be greatly appreciated. Thanks so much!