I've found that the best color is usually an equal mix of daylight bulb and acitinic bulb, basically what we have in our JBJ tanks.
I also have an Eclipse 12 that came with only a daylight bulb so I bought a 50/50 bulb and it made a heck of a difference in viewing that tank
According to my LFS, I can keep quite a few species of soft corals under the current light, but he said no clams, or hard corals should be kept under this lighting.
By the way, stuff that heater in the back sump if you can, I did it and it cleans up the tank so that it has the ability to look more natural.
Is that liverock in there or what? I think I see some coraline algae, but Im just not sure.