Soleron on 01 October 2009
Don't buy prebuilts; you are being ripped off. You can pay half that price for something with the same performance on games.
CPU: Phenom II X4 945 ($170)
GPU: AMD Radeon HD 4870 1GB ($125 w/ rebate)
RAM: 4GB DDR3-1333 ($71)
Motherboard: ATX 770V motherboard ($70)
HDD: 640GB ($55)
ATX case plus >500W PSU ($50)
DVD burner ($30)
Total: $571, matches any machine you listed in games.
CPU: Core i5 750 ($200)
GPU: AMD Radeon HD 5870 ($380, inc. 2 free games)
RAM: 4GB DDR3-1333 ($71)
Motherboard: micro-ATX P55 motherboard ($110)
HDD: 640GB ($65)
micro-ATX case plus >500W PSU ($50)
DVD burner ($30)
Total: $906, outclasses any machine you listed, will play anything on max settings at at least 1920x1200 if not 2560x1600.
