I'm not a memory expert, but I own both this (2 sticks) and the
Corsair, and prefer the Corsair (although the Kingston is solid.) That said, Anandtech did a review on value RAM and this came up recommended (for the price, and functionality) - you can look for a link on this site. As for the rebate, I did find a working link for this on one of the other deal sites - I'll try and find it and post it - it looked fine date-wise.
EDIT:
Rebate Link
(Bear in mind someone found the rebate, not necessarily something listed by outpost, so confirm first with Outpost)
Anandtech Article
Oh, and the last Kingston stick (this model) I bought was actually one by ELPIDA (Kingston invested in the company.)