Looking at upgrading my PC sometime soon, but i want to start with the graphics card first. Have a few hundred to spend on one, but not sure what to get?

Going by Tekheads, the ATI cards seem to top out at £170, whereas the Nvidia ones are way more expensive?

I want a card that will be able to run games pretty much maxed out, but really have lost touch with whats good and whats not!

Oh i have a SLI compatible PCI express motherboard.