A couple of days ago, I placed an order for a Sapphire Radeon 9600XT 256MB card from overclockers.co.uk but they said it was out of stock and offered me the same card but 128MB as an alternative (with refund in price, of course!). I've actually heard that it makes more sense to get the 128 instead of the 256. Is that right? I've heard the memory runs slower or something. I won't be running resolutions more than 1024x768 in most games and I don't even know about AA etc. But which card makes sense to buy?