I am using a black box 165W right now and like it, but it is too short for my tank. 36" tank, 16" light. I am looking to upgrade to the Viparspectra 300W/ It is 30" and has a better mix of spectrums, comes with 90 degree lenses installed, and is somewhat controllable. It is still a "black box", but a better one. It is about $230 on Amazon.
Whatever you get, make sure it uses at least 3W LED's and you should be good.