inexpensive gaming computer?

I want a 0-0 computer for gaming mostly to play games like team fortress, left4dead, and diablo 3 when it comes out (whenever that is) at med-high settings and i need your personal opinion to decide on the right one. At the moment im looking at the acer aspire as6930
www.newegg.com/Product/Product.aspx?
Item=N82E16834115539
also i made a custom dell that im thinking of purchasing, the specs are
SYSTEM COLOR Jet Black
PROCESSOR Intel® Core™ 2 Duo T6400 (2.00GHz/800Mhz FSB/2MB cache)
OPERATING SYSTEM Genuine Windows Vista® Home Basic Edition SP1
OFFICE SOFTWARE Microsoft® Works 9
WARRANTY AND SERVICE 2Yr Ltd Hardware Warranty, InHome Service after Remote Diagnosis
HD DISPLAY Bright, glossy widescreen 15.6 WLED display (1366x768)
MEMORY 4GB Shared Dual Channel DDR2 at 800MHz
HARD DRIVE 320GB SATA Hard Drive (5400RPM)
VIDEO CARD 256MB ATI Mobility Radeon HD4330
INTERNAL OPTICAL DRIVE 8X CD / DVD Burner (Dual Layer DVD+/-R Drive)
BATTERY OPTIONS 6-cell battery
WIRELESS CARDS Dell Wireless 1397 802.11g Half Mini-Card with Netgear WGR614 Wireless Router
BLUETOOTH Dell Wireless 365 Bluetooth Internal (2.1)
INTEGRATED WEBCAM Integrated 1.3 MP Webcam
SOUND OPTIONS High Definition Audio 2.0

I would like your opinion on which one you think i should buy also your opinion on the video card of each computer and if you have any better suggestions for they would be much appreciated.

: http://alcoholdrugstreatment.info/inexpensive-gaming-computer