Building a gaming computer/hackintosh for the first time - need help!

ok so far the parts i have bought are...
P8Z77-V motherboard
Cosair 1600mhz 8gb ram
Intel i5 3570k

now i need to purchase a graphics card which will be compatible with OS X for hackintosh but is also good enough for games such as BF3 FSX SKYRIM etc etc

i was wondering if the Zotac GTX 670 AMP! edition would be compatible with OS X and if anyone could recommend it to me  

also i don't know if i should get the GTX 670 evga ftw or the gigabyte windforce edition. Which one out the two perform better?

I am looking for a card that is going to be reliable the asus i have looked at and it seems to be a hit or miss card so that is out of the picture.

also would 750w be enough to power my computer up? I might perhaps look at SLI in the future but for now i just want a single graphics card

thanks