Hi, I don't really understand what is the difference between all the brands for the same chipset of a card. For example, I'm looking at a x1900gt (is that good? or should I get a x1800xt or should I wait until dx10 cards come out for them to drop the prices?) On newegg, ati, sapphire, and connect3d all make a x1900gt and the specs looks uh...identical, but the price differences on them are huge. I was just wondering what is causing the differences on these things.