Here mate, I posted this a while ago, its a FPS list... more or less what I got....
it might help you in case you want games..
"Hello, I do have a Gigabyte 680gtx with a 1138MHz OC GPU, i7 and 8 GB DDR3, you know the normal hi end gaming pc... and I play bf3, crysis 3 and Starcraft 2. The GPU is not enough to hold 120 hz on ultra settings.... I have an Asus VG278H, the 3D one; I will post my FPS for each game, so you can get an idea...
Battlefield 3 - Vsync on - ultra settings : 2D= 75 FPS, big maps 55 FPs +-... 3D = 30 FPS +-
Crysis 3 . Vsync on - ultra settings: 2D= 30 FPS .... 3D = 20-25 FPS .... (not recommendable in ultra settings)
Starcraft 2 "Extreme", Vsync on: 2D= 99 FPS approx .... 3D= 40 FPS ( I do not recommend play it on 3D but watch replays instead because there are too many bugs for the 3D settings... )
Crysis 2 ultra, vsync etc... I was getting like 50 FPs approx.
If you want to play them at ultra and super smooth, you either need a SLI ... but you should go deeper on the titan specs cause I heard that 2 GTX680 cards which are the same money give you 130% more performance than the titan... but... your call "
BTW which monitor are you getting?