Help with new build plz

Hello all im trying to build a pc for my wife. all she needs it do is run farmville and world of warcraft and a bit of web browsing.

i look at toms $400 dollar pc it looks good but some replys were diss'ing it. i think it would work for what he needs for gaming.

i use most of the $400 build

ASRock M3A770DE AM3 AMD 770 ATX AMD Motherboard

Rosewill Blackbone Black Steel / Plastic ATX Mid Tower

Western Digital Caviar Blue WD2500AAJS 250GB 7200 RPM 8MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare

SAPPHIRE Vapor-X 100273L Radeon HD 4850 1GB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFireX

COOLER MASTER Elite 460 RS-460-PSAR-J3 460W ATX12V V2.31 Power Supply

Crucial 2GB (2 x 1GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Dual Channel Kit Desktop Memory Model CT2KIT12864BA1339

AMD Athlon II X3 445 Rana 3.1GHz 3 x 512KB L2 Cache Socket AM3 95W Triple-Core Desktop Processor ADX445WFGMBOX



think the only thing i changed was the CPU and video card. it came out to $411 was hopeing to save the last $100 for windows7.

my max budget is $500 if theres anything wrong here plz tell me or if theres some thing i can improve with a few bucks.

or if this system will suck with what she needs to run on it.

thanks for the help.