XM and ReefLux tend to be the recommendations of the day -- XM has great PAR, ReefLux has great color definition... I ended up going with Phoenix 14k's, cuz thats what came free with my hood

I'll prolly try out the ReefLux 12k's next -- seems like it would be in line with my color tastes.. I worry less about the PAR, and more about getting a color level I appreciate in the tank -- the intensity from just about any bulb you add will be plenty for great growth..

-Justin