I swear I don't do this to be a smartass (that's just a nice side-benefit, lol) but you've noticed those links at the top of Emmerald's site, right? : )
http://www.emmerald.net/Cat_DPS/Head.html That's what you need as far as a "list" but I suspect you're looking for a guide including "best value" pieces. I too was looking for a guide like that, similar to the one for tanking. Somebody did create a loose one that I think you can get to via the sticky, but it was couched in the logic that there's a lot more options/flexibility so you don't need a guide that's as well-formed as the one for tanking.
I know you don't like PvP, so if you're a leatherworker the Primalstrike set rocks the house for chest/belt/bracer slots. Staff of Natural Fury is a good quick way to gear your DPS way beyond your current level of progression, but it'll set ya back 1500g+ in the AH. I'd have other suggestions but have to get back to work. :)