Go look at others tanks and then mimic the look you want. As far as which lighting is best is an arguement in itself MH vs T5HO vs CFL like Chevy, Ford, and Dodge. One word of thought the fish only thing should never come up because there are so many low light corals out there that fish will will not eat. Xenia, Mushrooms, and some GSP's come to mind. Remember some corals are hardier than fish and they help filter our tanks.