With the release of the death Knight set last week, all the tier 13 armor sets have been revealed. These sets will be dropping off the various bosses in the patch 4.3 raid, Dragon Soul. You won't be Bookwowgold.com able to buy them with valor points (although there is an extensive collection of non-set valor point gear) http://www.tomshardware.com/forum/317523-28-patch-tier-armor-sets