I want to buy a new PCI Express Graphics Card to go with my Athlon 64 X2 3800+ dual processor & my Crucial 2GB ddr kit plus my ASUS A8N-SLI Premium motherboard.

I'm looking to spend around £130.00 on one but i just don't what the fastest mid-range card to go for, i've tried looking on tons of web site for benchmarks,reviews etc but can't find any up to date tests on cards, maybe i'm not looking right, anyway i don't know wether to go for ATI or Geforce, the Geforce mid-range cards seem abit pricey, i just don't know which is the best for this price that's why i need your help.

I have a Sapphire X800GTO² 256mb GDDR3 PCI-E in my other pc but i don't know wether to get the same card or not but i just thought there maybe a better card out there. Any help would be great thanks