GPU Dilemma

[ICEx21]

Hi people,

I'm having a dilemma at the moment on which graphics card to get due to so many recent new releases from Nvidia and it's just confused me.
I had my heart set on a 1024meg Gainward Bliss 8800GT and now I hear the new GTS's are so much better and some people tell me that I'm better with a GTX.
I currently have a amd 4600x2, 2 gig of ram, radeon x1900xt and a crossfire asus mobo. I wanna play all my games at 1680 * 1050 and my current graphics card is beginning too struggle in certain games.
Any ideas on which card would be most suitable to me? I have about £250 to spend maximum.
Any advice would be greatly appreciated

Thanks!
ICE

PS. I know my mobo won't let me do SLI but I plan on going down that route at a later stage sometime next year.

 

[ICEx21]

Hey thanks for all the replies people, I think I'm going to go with the 8800gtx mainly because I want to play with max graphics in most games and I amn't getting quad core till next year
On the plus side it will go nicely with my zalman gt1000