Stat priority for bears in patch 4.2 remains armor, stamina, agility, mastery, crit, expertise, hit, and haste. Rather than rehash territory we've already covered in our first set of bear gear guides for Cataclysm, the lowest piece I'm going to list in each slot is the best available piece from 5-mans, reputation, or the new Molten Front vendors. If you're starting from absolutely nothing and need some ilevel 333/346 gear to tide you over, I would recommend the previous bear guides. Otherwise, your goal should be to get to at least the lowest piece in each slot on this list.
As always, I'm bypassing PVP gear because so much itemization is wasted on resilience. However, if you want to use it and you've got a better piece than would otherwise be available from PVE, knock yourself out. This week, we'll cover the helm through boot slots, and next week, we'll tackle rings, trinkets, weapons, and relics.