The second one. It'll be much more useful in everyday situations too, due to the higher amount of RAM. The video card also trumps the first one.
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AMD X2 3600+@3.00|2GB Crucial Ballistix Tracer PC2-8500|evga 7900 gs (750/1780) Volt-moded|ASUS M2N32-SLI Deluxe|2 x NEC Multisync 90GX2 19"