Amd radeon 7970 or nvidia 670 gc paired with a amd 6770 for hackintosh

The NVidia Tital will never be that cheap.

Also you can't run 6770 with either of those cards. You would have to get the 670 or 7970 and take out the 6770. I would recommend the 7970, since you're already familiar with the eyefinity, it is faster than the 670 anyways and will overclock and be faster than a 680.

You won't be able to use the two cards at the same time (any combination). They are all very different architectures. In terms of driver support, you'd probably be better off with the 670 (for the reasons you listed), though I've never used hackintosh, so take that with a grain of salt.

The Titan is priced at about $1000, so it won't cause a price drop.

About the 7970, it is faster than the 670, and you'd have fewer driver headaches if you picked the 7970 (since you are already using a Radeon).

Personally, I'd go with the 7970.

In addition to what the above ppl said, dont forget to check what connections the card you want to buy offers. Some 7970's have different outputs than others depending on brands or editions.

why wouldnt i be able to use the 6700 and 7970 together it doesnt have to be crossfired or anything like that just used as a 7970 when i boot into windows and then disabled and use the 6700 when i boot into osx?

I'm sure you could go that route. I think that people above me assumed that you wanted to crossfire the two Radeons which isn't possible

Just my Two cence, go with the 7970. It will save a lot of time and will run amasingly.