Right now Im using Aqualine 20k HQI bulbs. I have been running them for 9-10hrs a day since June.
http://www.aqua-medic.de/index.php?r=catalog/product&cid=45&id=208
My parameters are as followed:
CA: 550 (slowly lowering this by using IO)
Mg: 1400 ppm
PO4: 0
DkH: 9
Nitrate: 0
Nitrite: 0
Maybe I should go with the Reefbrites and throw in some 14k's in the MH. But I am getting a really "washed out" color right now in my tank. My only concern is the design of the canopy I made for the tank. It does not allow for much room for other lights, but I guess I could always go back to the drawing board and build something new.