I currently have a GTX 260, and a C2D 8400 @ 3.8ghz, 4gig ram. Just got Metro 2033 and it's a little sluggish on high settings. I like to run games maxed out settings and AF and AA at 1680 x 1050. Would it pay to upgrade my graphics card and/or get a quad core?
Quad Core would probably help more honestly. I think there were a few benches on Metro 2033 but unless you are willing to shell out $700 for a 5970, you're not upgrading significantly. I would just wait honestly.