Buying A New Computer Need Input

[compilliterate]

I was thinking of buying a new computer for playing my online MMO games Ive been contemplating between these few computers and was wondering if you could help me make a solid choice.



XPS 730 Desktop: $1129.00
Genuine Windows Vista Home Premium
2 GB DDR3 SDRAM 1333MHz (2 DIMMs)
500GB NCQ SERIAL ATA (7200 RPM)Video
512MB nVidia GeForce 9800 GT
Sound Blaster X-Fi XtremeMusic
Intel Core 2 Q9450 (12MB,2.66GHz, 1333FSB)

or

XPS 630 Desktop: $850.00
6 GB DDR2 SDRAM 800MHz (4 DIMMs)Hard Disk Drive
640 GB SATA Hard Drive (7200 RPM)
512MB nVidia GeForce 9800 GTModem
56K DataFax Modem
Intel Core 2 Duo E8400 (6MB,3.0 GHz, 1333FSB)

or

XPS 630 Desktop: $1109.00
4 GB DDR2 SDRAM 667MHz Dual Ranked (4 DIMMs)
1 TB SATA 3.0Gb/s Hard Drive 32MB Cache (7200 RPM) 2nd Drive
500 GB SATA II Hard Drive (7200 RPM)
Dual 256MB Radeon ATI HD 2600 XT
Intel Core 2 Quad-Core Q6600 (8MB L2 cache,2.40GHz,1066FSB)

Those are the three I was looking at, which do you think is better and why? Or would it be a wise choice to go away from dell and build my own PC.

 

[Tyor]

http://www.cyberpowerpc.com/system/Intel_Core_2_Quad_SLI_Custom_Build_Configurator

Build off of this computer. I suggest customizing it with a better video card, maybe the nVidia 9800 GTX, a better power supply, maybe the 650 watt, and a better cooling system. If you choose to get 4 GB of RAM, you MUST get Vista 64 bit. The 32 bit can only use up to 3 GB, I think. I know for sure it won't use 4 GB of RAM though. I got my PC from these guys, definitely cheaper. Unless, you get those DELL PCs with a free monitor.