Bit of advice needed :)

[Sidneylopsides]

I've not been keeping track of graphics cards development since I got the one I have now, an X1900XT, but I'm wanting an upgrade. As I'm not sure what to go for, I thought I'd ask here first! I've got a couple of ideas, but usure if they are good. I've used the guide thread to help too.

The machine now is a Asus P5W, [email protected] and 2GB RAM.
I'm using a Dell 2407 and want something that will play games at 1920x1200 at an ok framerate.
The current card is doing ok to be honest, but I want something newer, but my budget is only up to around £150 at the moment, so far I've seen a few but don't know what would be best value.
I play mainly FPS, HL2 based games, Crysis etc.

OcUK GeForce 8800 GT 512MB GDDR3 HDTV/Dual DVI (PCI-Express) - Retail
owerColor ATI Radeon HD 3870 XT Extreme 512MB GDDR4 TV-Out/Dual DVI/HDMI (PCI-Express) - Retail
Sparkle GeForce 9600 GT "Cool Pipe 3" 512MB GDDR3 TV-Out/Dual DVI (PCI-Express) - Retail
Asus GeForce 9600 GT 512MB GDDR3 TV-Out/Dual DVI (PCI-Express) - Retail

Those are what I've looked at so far. I nearly forgot, I've got a Zalman Reserator cooling the machine (CPU, GPU, NB and graphics RAM), so if there's anything that can use the same water blocks or is silent anyway that would be
preferred.

edit: I forgot about my sig...