Overall, the second one. Not sure how the 7900GS stacks up against the X1650 though. The first one might actually be better for gaming if there's a difference in its favor.
I would say the Intel set, but see if you can't switch the video cards, I think the 7900GS would perform better. Or check out the Sapphire X1950XT 256mb card, its super cheap and will rape either.
The 7900GS is a better card than x1650xt, therefore rig 1 is better for gaming. Rig 2 is probably faster for all other applications. May be you can upgrade the GFX Card on rig 2 sometime in the future. Overall Rig 2 will last u longer.
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