quote from szeged(oc.net)
"if you are air cooling, save some money and get the normal classy, if you are watercooling with a good waterblock, the kingpin MIGHT come out ever so SLIGHTLY ahead, and not by a lot. But if you want to overclock with a hydro copper block it might not even be worth it under water, hydro copper blocks arent exactly the best for overvolting."
TBH if i did get the standard classified's i wouldn't be too bothered about overvolting etc, it would be more for there looks and backplates
edit:do we know what memory the current 780 classies are using?