hi,

Recently been looking into various new graphics cards that are on the market, but i'm having trouble in deciding what the best card is for the budget ive got, in terms of performance and quality. I'm looking to spend upto £250, not really any more than that.
I was previously running an ATI Radion 9700PRO, which all of a sudden gave me red and purple lines down my screen, i spoke to some people and they advised that it needed replaceing. So, with no inspiration to buy a new card i pulled out my old Geforce 2 from an old PC and shoved that in, with some heavy tweaking ive managed to run some of the less demanding games quite smoothly, namely CoD1. But with many new games on the horizon its time to look into a new card.

I've been looking mostly at the 6600GT 128 or 256MB as this is well in my price range and i've heard nothing but good things about it.
Second is the 6800GT, but with my MOBO only supporting AGP, the price of the 6800GT AGP cards are more money than i would like to spend - is it better to get a 6800, or a 6600GT? -
Then onto the Sapphire ATI Radion X800 XL 256MB, which ive spotted for £211 - supposably a nice card, but havn't heard much about it.

Can anyone give any suggestions as to which card, within my price range, will deliver most performance? not necessarily out of the cards above, but any card currently on the market. Also, what are the major advantages of having a 256MB card over a 128MB, is there any significant increase in performance that i should considder when buying my card?

Thanks.