System Upgrade Video card/memory help

My current specs are:

E6850 Duo Core 2 3.0 Ghz (Non-OCed)
2GB Pc6400 DDR2 800mhz
Nforce 650i Ultra NON-SLi motherboard
(Broken) Geforce 7950GT 512mb ddr2(Need replace ASAP!)
Windows XP Professional
Ultra ATX 600 Watt PSU



What do you guys think im a gamer and I intend on playing pretty graphic intense games, although my computer monitor is less then or equal to 19' monitor, so lower resolutions but I want goooood fps and nice picture.



my budget is >600 or around 600 bucks.
thanks

I'd go with an ATI HD 4870. Or, if you want the best, wait a bit, and the HD 4870 XOC edition and the 4870x2 will be out.

One thing to consider is what type of PCI Express slot you motherboard can support 1.0/1.1/2.0E....

If you have an older slot you might not benefit from a newer card...especially if your mobo is more than 7 months old...