Well after much thought and research I think im going to have to pass on the HQI MH lighting option. It seemd that the spread will not be optimal at the height I need to keep the intensity where I need it to be for a 70w fixture and in order to get a good spread with a 150w fixture I would have to have the light so high it wold blind people in my office. Im sad but not too sad as I have talked with Jim at Catalina aquariums and he will be building me a specialized 24" 4x24w T5HO fixture with hanging brackets for this tank. I think I will stick with the same Geismann Aquaflora X2 and Midday X2 that I have in my 37g. I will say this though the cost of some 6700k GE starcoats is tempting. Does anyone have any experience with them?