Sry for my english...
Talent build is evolution. When you will reach 80, you will have small mana pool, small manareg. And if boss fight length is ~8 min., you should heal all 8 min., not the first 4... So evolution begins with talents that gives more mana; manareg; smaller spell costs > then when you gear up, you replace these talents with talents that gives bigger heals; faster casts; smaller cooldowns.
Example of evolution (start):
http://www.worldofwarcraft.com/info/...50053025301000
NB!!! this is only example !!!
There are all possible talents that lowers mana problems when main heal spell is Regrowth (this spell has good synergy with Improved Regrowth<>Nature's Grace<>Living Seed). So its more than 50% crit >> next spell 1.5 sec cast (like global cooldown) >> leaves seed on target for 30% healed >> leaves HOT on target for 21 sec. so new direct spell Nourish gets 20% more heal...
From this point you can start replacing talents. If you use Nature's Swiftness or Swiftmend, take them instead of Natural Perfection. When you feel comfortable with mana, you can change talents like Dreamstate and Moonglow in Balance tree.
There will be a point in evolution, when you will see that there is only 1 talent in balance tree (Nature's Grace), and he doesn't worth 21 points. There is so many new REALLY GOOD talents in resto tree. So in one or another way, true PVE resto build will end up in FULL resto build.
In BC there were problems with resto tree. And to increase my HPS, I was raiding in this build (now is summer 8)):
http://eu.wowarmory.com/character-ta...gerspine&n=Ahh
But in WotLK I will have no problems to spend all points in resto tree. With haste rating even HT i think will be usable.
And again: when you will reach 80, don't look internet for one best real resto pve build. If you have problems with mana, take talents that suits your needs, you can change them later.