If the card is clocked higher thats called a factory overclock, if you get a GTX 460 you will be overclocking it yourself anyway. And you can overclock any GTX 460 to its SuperClocked Edtion clocks with ease. The DirectCU edition has very good cooling by the way.
Also you can't go wrong with the Cylcone as decode said, the difference between the two is really little so personal preference can be a big deciding factor there.
Unless you're trying to save a dollar I wouldn't get anything but those two.
Also if you are in the US this deal might still be good.http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6500400&SRCCODE=HARDOCPJS&cm_mmc_o=dRqJ4mCjCZ-qKR2VCjC2zfGpjnoCjC4SDnCiSxi
Add the promo code FYL5221, brings the card down to 210. Not sure if its on backorder or anything, however.