How much are you paying for that Leadtek? I personally would go with eVGA and I think most members here would agree. Of course, unless there are circumstances the allow you not to buy this card.
Ok. I am really getting fed up with this. eVGA is waaay over rated. It offers absolutely no benefits over other 6800GT cards. In fact, I have read reviews that say it has a noisy (compared to other 6800GTs) fan. Several people even had a very bad problem where the fan on the video card sucked in the eVGA sticker and caused it to overheat and die. That leadtek card is a VERY good card, and it comes with the BEST all copper massive heatsink, making it a GREAT overclocker. But you do realize that you have the AGP version listed and a PCI-e motherboard? Here is the correct one: http://www.newegg.com/Product/Product.asp?Item=N82E16814122209