Aww... you've got a PCIE 2.0 version. Not-so-old after all.
I've got an 8800 GTS 640MB version. That's it.
I'm upgrading to a quad-core next month (PhenomII X4 920). I hope that will provide a performance increase with my new 6GB of very nice timed RAM.
Then I just have to get a better GPU. I've got a GTX 285 in mind. Take me a while to get the GPU though, tight on cash.
What do you guys think?