Maerduk has a lot of great ideas, it would be the best idea to listen to him.
Some minor adjustments that I would like to suggest, from my experience playing in this bracket, are as follows:
The only stats that matter are health, spellpower, and intellect in that order.
You can look at my armory, my gear is not what I want specifically, my parents are limiting my playtime but when summer hits I should be able to get to
http://www.chardev.org/?template=164460.
My logic stuff and personal experience: Flash of Light costs a measly 55 mana in this bracket. If you think you are going to have to chain-cast for a minute or more straight, then 2000 mana is a good amount. I had that much, but realized I never dropped below 1000 before combat was over
in battlegrounds. More mana is required for arena, I guess. But hunters with their massive dps AND aimed shot are the biggest problem. If you have enough armor and spellpower, then you can heal yourself with FoL more than their dps, even when aim shotted. Rogues are less of a problem now with aura mastery.
Basically in that build above I am using gear that I currently have available without AH'ing around any more with getting a lot of health and spellpower. If you feel that you need more mana, then by all means switch out some "of healing" with "of the eagle". I recommend switching pants first, then probably your headpiece to whisperwind headdress.
If any of this is unclear/wrong or I haven't covered any problem area then please ask me about it, I am just a human being and this is just what works for me!
edit: remember the BoA now has 23 spellpower instead of the listed 4, that build gives you 175 spellpower which worked for me pre-3.1 when I had the leg patch, no reason it shouldn't work now, especially with the new 5% talent.