Upgrade to better GPU or to SSD?

[bw_wolverine]

I'm seriously considering upgrading for this game. I'd like to know what people think would be a better upgrade for me:

CURRENT SPEC (nothing is overclocked):
Intel i7 940 2.93gHz
nVidia Geforce GTX 260
HDD 10,000rpm Raptor
4 GB Ram Corsair

Price is a factor, but only insomuch as the SSD upgrade would be cheaper to get a top line one vs a top line graphics card (I think). If the performance increase to cost ratio is further in the graphics card direction, that's the way I'd go.

Just curious what people think.