I'm running LEDs that I pieced together myself.
I agree there are a lot of different kits out there, and its hard to make a choice. I think most of the kits are pretty good, even the ones from China. As long as a kit uses CREE LEDs, and it tells you exactly how many watts of light it puts out, then its probably worth buying.
For reference, for a planted tank, you should get between 1 and 2 watts per gallon of LED light. For non planted, .5 watts per gallon is enough to provide good light.
I have a planted 55g tank, and I had 128w of florescent tubes (4 X 32w 4' lamps), and I switched to ~70 watts of CREE LEDs, and I think its as bright if not brighter than the old florescent setup I had, although my florescent setup also didn't have very good reflectors.
For moonlights, I would buy some cheapo LED blue ribbon lights for like $20 or less on ebay, and just leave them on 24/7. You don't need them very bright at night, and you can't see them when the other lights or on. You don't need anything fancy.
Another guy posted that he bought lights from this website. I've never seen them before, but their products look legit, and they have good prices. I like that they include everything including the heat sink, and you just glue the lights on and wire everything up.
http://www.aquastyleonline.com/