What graphics card

[Herr_Ando]

I've not been keeping up with new hardware latley.

I'm looking for a graphics card in high-mid-range segment.

My current machine is:

Leadtek 8800 GTS 640MB
AMD X2 6000 + Arctic freezer
EVGA nforce 590 SLI
4GB Corsair DDR 800
2 Samsung F1 1tb 32mb cache drive in raid 0
Liteon DVD RW
Creative XFI Gamer
Coolermaster HAF
Tagan 600Watt Dual Engine PSU
NEC MultiSync WGX2 20" (playing at 1680x1050 where possible)
Vista 64-bit Ultimate
Creative Fatality 1010 Mouse
Saitek Gamers Keyboard

I'm looking to get a performance boost in the following games:

Oblivion, COD4, Enemy Territory, Stalker, C+C 3.

Would I be better trying to get another 8800 for SLI for about £80ish or would I get better results with a newer single card?

My budget for this is about £200-250

I've heard the new Nvidia cards incoroprate on-board physics, would this technology be useable/beneficial in any of the games i mention?

 

[fraps]

I suggest 4870 and keep any change

 

[rjk]

yo - have a browse of my guide in the sig!

i would go 4870

 

[-Aura-]

Any of these or these

 

[rolypolyman]

What res do you game at?

 

[Herr_Ando]

My monitor is a NEC MultiSync WGX2 20" - I like to play at the monitors native resolution 1680x1050 where possible.