Browse through some online sites that are selling fish and looking at the pictures and descriptions. Find what you like that are suitable to your tank (minimum tank size and aggressiveness etc) and come back here and ask specific questions.
One web site I like is live aquria. I have used them for years and always find new info that I didn't notice before.
http://www.liveaquaria.com/product/a...plies.cfm?c=15