tkeegan1 :
The GTX 670 looks like it might be around $100 more than I was hoping to spend. However, hypothetically if I was to buy one and then maybe in some months or a year I buy a second would that be comparable to what a 770 or 8950 (or whatever numbers they use) next gen card could do? I'm pretty sure my mobo has SLI which from what I understand lets you run 2 nvidia GPUs. And would they have to be identical models or do they just have to be 670s? Thanks for all your help guys, I'm trying to get a handle on all of this.
Yes, just get one... they perform extremely well and will probably impress you by itself.
Yes you can sli them in the future if the need or desire arises. so long as you have 2 pci.express slots on your mobo
It is by itself compareable to the 7950-7970, there are no 8000 series yet...
There are only two nvidea cards better... the 680 and 690... I am pretty sure that the new Titan card is just a suped up 690.....none of them are worth the extra cost jump compared to the performance of the 670.
Don't be fooled by the radeon lovers hype about better fps than nvidea. They (radeon cards) come with their own whole set of potential problems. Nvidea is so much smoother and have a much better driver success rate, that they are worth much more in my opinion!!!
Also, to sli, you need two cards that are the same size ie.670 +670 they don't always have to be the same, but you will have better results if they are.
You could also back off of the i7 and get i5 3570k. It will be more than enough for gaming!!! Unless you will be doing allot of video editing.
I also noticed that you mentioned earlier that you had in your plans 1x8 gb ram. This will prob work in your pc, but you should either get another 8gb and run them dual, or get 2x4b instead, as ram runs better in dual channel mode
One other thing you could do to save some cash for the 670, is back up from the extreme6 mobo to the extreme4 mobo
It is a great mobo and will serve you well. I like asus better myself but asrock will do nicely