My own UI is under constant revision, but it’s at a place right now that I really like.
Here are the mods that I use and how my UI looks:
Aegis Website - WowStead
X-Perl
Dominos
Quartz
Atlas
Atlas Loot Enhanced
Titan Panel
Recount
Deadly Boss Mods
Simple Minimap
Satrina Buff Frames
TipTac
Sunn Art
XLoot (Monitor, Rolls)
FuBar (GuildFu, DualSpecFu)
Carbonite
Prat
Talented
Bagnon
Examiner
Obituary
I've tried my hand at writing a character management guide for my guildies, entitled At The Top Of Your Game and found at my guild website on the public forums under Information About the Guild:
Aegis Website - WowStead
The last section of the guide deals with a healer’s UI and describes mine at length, and I thought I’d link it here in the hope that it might make sense to or appeal to other healers.