If you're looking for the ultimate gaming card out there, money is not an issue, and of course you're not running Vista, Asus has a card that's perfect for you.
They have announced their EN8800GTX AquaTank. This massive card will come equipped with their all-in-one water cooling system, allowing it to run at about 12°C lower than normal.
You'd better be quick to grab one, as there are only going to be a thousand units available. Expect to see it in March for a hefty, undisclosed price.