afaik Geforce 7800 GTX is the newest/best nvidia one, and radeon X800 XT is the newest/best ati one. The nvidia card is better and newer, but probably costs quite a bit more too. I don't personally pay that much attention to hardware releases and information but this is what i gather from all the things i see
pfft...and he claims he doesnt believe in the supernatural
i think by "latest" you meant "fastest". in that case, the x850xt PE would be the fastest card to come out before SLi's debut. im assuming that you are not restricted to PCi-Express so ill also put in the fact that u can, in the future, upgrade your hardware to take advantage of ATi's crossfire if u choose this card.