Here's the UI I'm currently rocking.
Trying to get as much screen clutter out of the way as possible. You can bring up side-by-side Damage and Healing meters over the Trade/Item chat (bottom right) by clicking Skada. I try to minimize it during combat as much as possible so it doesn't distract me.
Idle:
cl.ly/image/2s2M081s1j3P
Raid Combat:
cl.ly/image/2x2w2z0q061Y