Woohoo, just made my first major (read: most expensive so far) purchase to date on the tank: LIGHTS.

I've wanted to go T5 HO or VHO from the start, so on the advice of Grim Reefer, the resident T5 expert (and a few other folks) from ReefCentral, I went with the following:
http://www.reefgeek.com/lighting/T5_Fluorescent/Sunlight_Supply/Tek_2_Retrofit_Kits/60_inch__6x80W_Tek_2_T5_Very_High-Output_Retrofit_Kit_w!_Bulbs_by_ReefGeek
T5 very high-output fluorescent retrofit kit complete with Sunlight Supply Tek 2 individual parabolic reflectors for each bulb made from 96% German reflective aluminum, two IceCap 660 electronic ballasts, a power-cord, wire bundle and heat sink for each ballast, moisture proof end-caps, standoffs and choice of bulbs from any of our current selection of high-quality lamps. Kit sold complete except for mounting screws. Some assembly required. IceCap ballasts engineered to "over-drive" each bulb to approximately 100 watts for superior output. Because the bulbs are being over-driven cooling fans are required to maintain both bulb output and bulb life. (Don't settle for inferior T5 electronic ballasts, like the Workhorse, that are commonly sold with other T5 retrofit kits.) Multiple ballasts allow for independent lamp control. Produces virtually no noise.

I also got two IceCap fans (4" 50-120cfm) to cool 'em (once again, on Grim Reefer's suggestion).
Lamp-wise, I got the following combo:
(front of the tank)
ATI Blue Plus (ballast 1)
GE 6500K Daylight
ATI True Actinic (ballast 1)
ATI Pro Color
ATI Aquablue (ballast 1)
ATI Blue Plus
(rear of the tank)

Okay, starting to get waaaaay too excited about lights.