Hey!a trip to the dark side (dps)
You are ready for T5, but unless you can find a guild still raiding right now, you'll barely be off your trial period before Wrath hits. A lot of guilds are winding down and no longer raiding now, mine included. I'd farm badges to fill any gear gaps you still have so you're at your most ready to go into Wrath. FYI if you didn't already know, BoJs will be worthless at 80 so spend 'em now. Gearwise, any of the badge chests would be good because the paladin ones are being redesigned due to the large change in paladin mechanics which happens to make them desirable to warriors too
Edit: I just checked, the Stoicism chest is still the best for warriors.