With arena points i woud have saved got brutal gloves (s4) 1175AP.
And then if you get 1600 rating legs... if you dont. then get the s3 head or chest. Since you wont get that in a loooong time untill you really gear up som.

Honor: first Priority is s2 wepon with enchant like the guy above says. Then i would have taken the shild, since there is hard to get any nice dps shilds other then those, and the armor will save some lifes..
After wep and shild, i would have taken the s4 honor items first, Belt and neck. Then bracors asap when you get 1575(ibelive) rating. In the meen time after belt and nech you can go for s2 parts or s3 boots(you wont get any better untill you get high rating)

When it comes to back. If you are able to farm some heroics then get the 60x BoJ backs, they are imba.

Trinket and rings: i use the trinket from last boss in SP heroics. I also use the shoulders from there. So if you figur you will farm heroics for the backs. then go SP as a priority, untill you get the shoulders and trinkets. I use the normal pvp trinket with 45 resilions on my main (he had way to much honor so there was no point in not buying it) and i just have the overlord trinkets + SP trinket on the alts.
You might considure buying the s3 ring asap aswell.. And just use the KZ rink on the second slot untill you get rating to buy s4 ring instead. There is also a nice JC ring that most JC can make for you kinda cheap. I use that atm since i dont wanna go KZ. :P

Also... Totem of void is a must if you dont have it.. Go farm Mech normal chestes if not

GL

EDIT: after looking at your gear. I can tell you that my first week of 5v5 a munth back i had lot worse gear then you have atm and i was still wining a few. Try to get your spirit up and win some