The Enermax got an outstanding review from a highly regarded reviewer. Link to conclusion page:http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=138
That particular OCZ got good reviews as well, but given the pricing you show, my recommendation would be the Enermax.
If for some reason the Corsair HX1000 is available at a lower price, it is also an excellent choice. But no need to unless cost savings exist and are interesting to you.
Edit: No comment on your third psu as I don't have any solid information about it.