The cheapest 780 gtx ti is the Asus directcu, at $580 on newegg. It seems to OC well. The other ones I'm considering are the EVGA Classy and Kingpin. I've seen reviews where the classy oc'ed better than the Kingpin. I'm trying to get the best 780 gtx ti I can, but if the Asus is 90% as effective I don't think I should price jump to over $700. So what do? Bonus question : There are used ones on Amazon. Some people say they only used them for 2 months or so, with no overclock. Should I buy one of those? Can I even return it?