Go get 2 Reefbreeder Photon 32's, especially if you wait for a group buy. Full spectrum, built in controller. Awesome light for the $. (Can see mine if your nearby, just PM)
Then Reefbreeders and others have "value" fixtures which can be full spectrum and fairly cheap but are usually just off/on + a dimmer knob if you are lucky. (With a quick look, something like option 3 from above posts link.)