

3 GTX 580

2 GTX 590
So for the past couple of months I've been saving up money everyday, I had enough to upgrade the core components in my computer. Now I can't choose between GTX 580 3-way SLI or GTX 590 SLI.
Facts I know:
2 GTX 590 will outperform the 3 GTX 580, because even with 3 of them, they will use a lot of watts and will need more cooling...blah blah. But its more affordable.
2 GTX 590 are recommended for 3D gaming. But are still efficient in running at high FPS for modern games.
If anything, I might either go with 1 GTX 590 or 2 GTX 580. With the extra money I can buy a new monitor, but whatever. And NO I will not be buying a 3D monitor or 3D stuff because I hate it.
I already asked these questions on a lot of different forums, like tom's hardware, but got no replies. So please, help me out.