I'd recommend the EVGA one. That cooler design will make the card run a few degrees warmer, but, it doesn't push air from the card around in your case and your other components will run cooler. It's better at pushing air out the back of the card is what it comes down too.
That core clock won't make hardly any difference, or you can easily OC to match it (I don't recommend OCing high end cards like this though, they should already be fast enough).
If you plan to SLI, again the cooler like the EVGA has is better, the bottom card won't be pushing hot air through it right into the top card.
I've never had problems with EVGA products, and I don't see many people on the forums that do either.