Geforce GTS 250 vs Ati HD4850

Since my 5 year old geforce 6800GT died yesterday I need a new graphics card. But I'm not sure on which one to get.

I've seen this ATI 1GB 4850 for £76
AX4850 1GBD3-PH - 1GB Power Color HD 4850, PCI-E 2.0(x16), 1900MHz GDDR3, GPU 625MHz, 800 Cores, DL DVI-I/ HDMI/ D-Sub - Scan.co.uk


Geforce GTS 250 512MB for £80
ENGTS250/DI/512MD3/A - 512MB Asus GTS 250, 2200MHz GDDR3, GPU 738 MHz, Shader 1836 MHz, 128 Cores + WoW Game* - Scan.co.uk

But would a 1GB 4850 be better than a 512MB GTS250 at the same price? Or would the 1GB GTS 250 be similar or better than the 4850?

They are pretty much equal,

Video Card Comparison - GPUReview.com

All depends on which has the features that you want and/or will use.