Woot, I finally achieved 1800 rating for Rated Battlegrounds on my horde tauren warrior, and with it, access to the long-coveted level 60 replica PVP weapons and armor for transmogrification. The Horde PVP rank title at 1800 rating is Legionnaire. The Alliance equivalent is Knight-Captain. My Alliance paladin got the associated achievement but not access to the PVP title or the replica weapons and armor. It seems like you have to achieve the required RBG rating for each character in order for you to display the associated pvp title or transmog the classic replica pvp gear.