Well you can get either the HD 7870 or GTX 660 starting at around $200. If you go a little above your budget, then either a HD 7950 or GTX 660 Ti. You have to decide whether the extra performance is worth more money or not.
You don't get ANY benefit when gaming from an i7 over an i5 - you'll have a way better computer spending $300 by saving $100 that'd be wasted in the CPU.
If it's not for gaming, then a 7850 will be fine.
From your other threads, yes, this is for gaming. Well bud, you just built yourself a very expensive pile of wasted money... You spent probably $250 too much on the motherboard and CPU, and way too much on the monitors... you need something like TWO 7950s to play smoothly on three monitors. Why would you choose the video card to crap out on and spend money for things that aren't at all helpful everywhere else?
Like the others have said, your budget is not enough for a good multi-monitor gameplay experience. So it might make more sense to game on a single monitor with whatever card you ultimately decide to go with.
Well, if you're still going to buy the components listed, get the 3570k over the 3770k because for gaming, HT makes ZERO difference. Also, you could get a "lesser" board if your budget it a bit tight. Also, if you're not running SLI or Crossfire, then a 600w PSU should be fine with no worries. But, if all the components you already have and then there's no going back, then 660 is the way to go. If you can squeeze out $50 more and get $300, then you can get a very good 660 Ti which is well worth the extra cash. It's pretty much a 670 with a 25% smaller bus width.
Thank you all for your comments and time to take a look at my question. I did not buy my cpu or motherboard so I will downgrade on that. The way I worded it might have confused some of you to believe that I already had the parts.