Last I looked people were still testing things out, though the Agrotech Magnums showed fantastic numbers and I went with them. That was four lights with 8ft ceilings, and the new place is going to be 16 with 12+ft ceilings. IIRC, Gavita and E-papillon are excellent if you have high ceilings, and the largest room will have two rows of two beds, so the E-papillon's greater spread might be worth it? The other room will not have rows, but with the same high ceilings would Gavita be better than the Agrotech?
gavita reflectors were made to concentrate light from high spots like greenhouses, concentrated light spot...where as the magnum was created to spread the light out evenly more than concentrate it
that being said...i was pretty surprised how well the AC DE reflector was compared to the gavita...i was also surprised how well the 1000w hortilux did vs the gavita ;)