[Phanx]

Looks really good, though I'd suggest adding the spell name to the cast bar, at least for units that can be NPCs (target/focus), since you won't always know the icons for every spell an NPC casts. You could even add a check that only showed the spell name when the caster is an NPC, and then put the name below the cast bar, extending the background around the text as well.

Also, make sure you distinguish between interruptible and non-interruptible spells somehow. Changing the color of the castbar would work (eg. green for spells cast by friendly units, red for interruptible spells cast by hostile units, and yellow for non-interruptible spells cast by hostile units).

My main objection is that it isn't very useful for healers, since they need to see the actual amount of health, not just a percent, in order to choose the right healing spell.

The non-LCD font looks much better, as well.