blazorthon :
Give me a single recent example of THAT. The GCN architecture is superior at overclocking than the Kepler architecture, so you're likely wrong about that already. The GTX 460 and 560 did not have ANY 3GB models so you're also wrong about that. I didn't base anything on speculation. I use facts. What you have just said to me is not only rude, but blatantly wrong in every way. I have overclocked Radeon 7850s up to the performance of the Radeon 7970. Radeon 7950s are even better than that and can go way beyond the Radeon 6990. If you don't want my advice, then fine, but the next time that you want to argue with a computer engineer, you'd better get your facts strait.
Wow you got a thorn up his ass.
Let's just get one thing straight.
Links you obviously know some good things about graphics card.
My recommendation from a college student who has a lot of experience in computer, but is not an engineer and in no way trying to tout his education, I'd say go with a single card solution, staying away from Sli/Crossfire will be your best bet.
Trust me you do not want to go dual cards yet. And if you really want to upgrade now or want to in general don't wait for the 660's. They are months away unless I am mistaken otherwise.
I'm actually on the fence and verge of upgrading because I want to play BF3 on Ultra maxed on 1080p with smooth game play.
I currently have a 5970 and while this card is monstrous the crossfire sometimes blows chunks. Many games can't take advantage of anything more than a single card setup.
Some games do it well but for the most part they don't. Crossfire setups don't even look at them because as powerful AMD cards can be, the drivers are made by 15 year old blonds high off of bathsalts. Meaning they are always bust, and you typically have to wait for new drivers to fix one problem for a new problem to occur on an older game you play, so then you have to wait for a new driver to have a fix for both of those problems, in which you start getting bad performance and weird issues in your favorite game.
But seriously, go with a single card setup. A 7970 will do fine. If you want to go all nerd action and overclock a 7950, do that as well. My suggestion get the Asus 670 it's overclocked and has great reviews and even tops a 680. Or go for a 680.
The performance of the 600 series is phenomenal. So just go with what you think. These are only my suggestions and out look. Not trying to be the anal computer nerd and force it on you. This is all just from experience.