sooo, rbg tank in 5.2, pve gear or pvp gear?

still a little confused, i know they said all specs will get a bonus in heals from pvp power, but does that make it better for tanks than pve gear? im thinking of buying a raid run for full pve gear if its ideal, but if pvp gear will be on par for fc, i dont want to waste the gold, thanks

edit, i ment 5.3 derp :/