My GeForce GTX 580s are still doing okay, but I'd love to upgrade. The expected performance increase is incentive enough, but Nvidia has added more incentive with a newly announced deal that gives purchasers of a a GeForce GTX 660, 660 Ti, 670, 680, 760, 770, or 780 a free copy of Splinter Cell Blacklist Deluxe Edition for PC.
The game comes out August 20th. Nvidia seems happy to give this one away as it shows off their cards in multiple ways. Blacklist uses tech like Direct X tessellation, HBAO+, TXAA and surround, so it'll make you feel good about the cash outlay for that 780.
This offer is good only until December 31, 2013, through participating partners.