I got the Standard one.
I'm not sure 50Mhz overclock is worth an extra $10 for the Superclocked versions, but I went with what was available (and they sold out 3 minutes after my order).
I was going to get a Hydro Copper... but $200 extra for a water block... EVGA is smokin' crack. I can pick up a water block later for around $100, if I feel the need. But Honestly, I think I'm going to stick with an Air Cooled GPU, and keep my CPU Liquid cooled for now. Since I run a 1280x1024 monitor still... I have absolutely zero need to overclock the overkill of a GTX680.