My current Rig:
ASUS P5B-E M/B (intel965 chipset) PCI-E 16x
Intel Quad Core 9550 @2.83GHZ 1333MHZ FSB
2GB Cellshock DDR-2 RAM 800MHZ 4-4-4-12 @833MHZ
Asus nvidia 7950 GT 512MB
Creative Sound Blaster Titanium Fatal1ty Pro
2x 1TB Seagate 32MB Cache HDs (Sata II)
2x 512GB Seagate 16MB Cache HDs (Sata II)
Corsair 1000W PSU SLI Certified
19" EIZO TFT 4:3 monitor
WinXP PRO En SP-3
With the exception to the graphics card, what else do I need to upgrade in order to play Crysis, CrysisWarhead, FarCry 2 and pretty much all current 3D games at 60fps with all graphics settings set to full @ 1280x1024 Resolution?
Also, what GPU do you guys recommend that I get? Nvidia or Ati?
I'm looking forward in using this new GPU (and Rig) for at least another 2-3 years for future 3D games like Doom4, if possible

I could spend around 400-450euros...
Thanks in advance.