I'm not a fan at all of cadlights setups. They have had lots of problems and they aren't very impressive in person. Thousand Island Aquarium on Utica Avenue in Brooklyn has them in stock if you want to see one up close.
I would recommend a Finnex setup personally, www.finnex.net
They are much nicer and you can often find good deals on a used one.
i currently have a completely modded ap 24g, to do over only thing i would have done was had a starfire tank of these basic demensions, shoot i have all the equiptment for a tank like that anyways, its drilled ect. it really all depends on how basic or advanced you want to go, and to a degree what corals you want to keep, and ap does suck cause of the bow and distortion. it has your eye's like this