Ret Pallly, Frost DK, & ??? (and some questions)

[Acidburning]

hello, first time post. I have been browsing and lurking around for a while. Got my keyclone updated last week, and wanted to start playing some 2 boxing again.

I mostly just enjoy to PVP since I have been playing wow. Stopped playing arenas after Season 3. Took a break, and now have booted everything back up, want to 2 box, took advantage of an Alliance DK I had, account transfer and faction changed it last week. Been having a blast in Wintergrasp with the Ret Pally http://www.wowarmory.com/character-s...&n=Acidburning and Frost DK http://www.wowarmory.com/character-s...n=Crashoveride in tow.



Question 1:
I am considering a 3rd toon. My options are:
LVL 70 Druid
http://www.wowarmory.com/character-s...&n=Burningacid

LVL 70 Priest (kind of biased, original vanilla toon, has like 54k kills on it from vanilla days)
http://www.wowarmory.com/character-s...ona&n=Medicate

LVL 80 Warlock
http://www.wowarmory.com/character-s...=Garona&n=Lulz

I am leaning towards a disc priest. It gives me some heals, some instants, a little more durable (from a boxing perspective) than the druid.

I have a few more questions, but I think I will save them for later. It's mostly about setup and what not. But I have been tweaking my 2box setup for the past week. Learning new things, playing around with different techniques. I want to make a more intelligent question about setup sometime later :]

Thanks in advance for your comments and suggestions on the comp.

Cheers,
Acidburning