Dell XPS vs Alien Ware Area 51……………….?

im looking to buy a great gaming computer and im looking at the Area 51 which has quad core 500 gb hard drive nvidia 2gb ram8800GTS grapic card water cooling 700 watt power fan and a nice case………the other one is XPS dell which same hard drive 8600 video card 24 ince ultra sharp moniter the area 51 doent come which moniter 2gb memoery……………………………………both are 3500 each plz helpe

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