I've got a 780ti that I was running with an FX 8120, the card is a monster. Mine's an Asus, OC'd it to 1126mhz no problem with the reference cooler on it, if you're watercooling, the sky is the limit.
You will not regret the ti. Another option you could do is a 780, and take the savings and buy a G-sync monitor, that'll give you an awesome gameplay experience. If you don't want to go that route, but want the best card, it depends on your monitor.
IF you're at 1440p or less, TI hands down, if you're going for 4K now or down the road, might want to consider the Titan, simply because it has more RAM for the higher res textures.
If you're like me and by the time you can afford a 4K monitor the Ti will be a faint memory, then might as well go with the TI as you won't max it out by the time you can afford a nice new monitor.
Hope my delirious rantings when I'm tired made sense...