You should get a big spread of light with the big reflectors.
Corals to tend to look better with a bit of blue, however whilst the arcadia bulbs are more white you do tend to get better growth but the corals look more washed out,
The narva 14k bulbs are really weak so you dont get great growth, they tend to have a low par rating. so there is always a trade off between looks and growth.
Found 400w bulbs are not that bright as i still have to run 8 x t5s. might try the iwasaki 6500k, but that would mean changing to mercury vapor ballast.
i still think 250w De bulbs are almost as bright as a SE 400w.
Are you running any glass covers?? pretty risky without them.