I am considering to do a major overhaul with my 5xDruids in the near future. I'll give you a few points for consideration I have right now in mind:

Khatovar has very good points, which I will consider myself for the Spec overhaul. Also as a rule of thumb consider, that Boomkins with lvl 80 and proper heroic/T9 gear have no mana problems at all (it was an issue while leveling up), so avoid +spirit in favor of +spdmg, +crit, +haste. Of course if the dropped/quested +spirit gear is an upgrade, equip it. On your Resto you will want those +spirit and +mp5, I personally prefer +spirit.

I occasionaly took cloths here and there too, while leveling up, but by now I have mostly leather gear (with very few exceptions).

Glyphs: I love those two starfall glyphs, Glyph of Focus (+20%dmg & -50%radius) and Glyph of Starfall (cooldown down to 1 minute, woot!) and use it almost continuously on this 1min cooldown basis. That's a 3-5x "mobile AoE" starfall every minute, kthxbai.
I still have Innervate glyphed, which is great for leveling up, but not really necessary anymore at lvl80 (with exception for Resto druid).

Other than that, I alternate wrath and starfire for the eclipse procs. I hope I will implement an intelligent macro setup for 3xBalance eclipse procs, there are some great ideas out here in the forum threads...