Need [H] upgrade advice

[kubebot]

Just bought an NEC 20WMGX2 which is native 1680x1050. Went from a 19" Dell LCD TV @ 1280X768. I need more FPS. Considering getting another 7800GT+new mobo w/ SLI or one 7900GTX/1900XT. Not sure how much my CPU is gonna hold me back. Not gonna run high AA/AF if it'll hurt my FPS. I mostly play COD2,BF2,F.E.A.R.(sure i'll play it again). Going 7800gt SLI would be the cheapest route, but Im a noise whore & would have to buy another aftermarket cooler. True that I would have to buy a new mobo for SLI, but it'll still be cheaper. Im actually just worried that SLI might end up being more of a hassle than its worth. Need your [H]elp!
System specs in sig

 

[kubebot]

1. 7800GT + Epox 9npaJ SLI = $415
2. 7900GTX = $550
3. 1900XT + VF700 = $485

which one would you do?

 

[VulturEMaN]

I'd go SLI just because it'll be beneficial for the future. When they come out with a game that is a vid card whore, then having those SLI 7800gts would be the best way to kill it.

Plus, no matter what card you have, FEAR beats em up. Goin SLI 7800gt would let you beat it back with that nice display.

in short, go sli, get a decent sli mobo, and have a fun time