Some people are complain about the 570HD fan noise. I'm seriously thinking of getting two 560 ti instead. Then some will say 1 580 will outperform them so...
2 560 ti or 580?
And how good is the 560 ti's overclocking? How much of a boost will I get in fps with a decent overclock on sli?
Personally I would go with either two 570s or a single 580. Both options are strong and still leave you at least one upgrade path to choose from when it comes to adding another card.