Stocking 40 gallon tank?

I am converting my 2-year-old freshwater aquarium to saltwater. :D does anyone have suggestions for stocking? I know I want 2 ocellaris clownfish, but I don't know where to go from there. The tank is 40 gallons and has a protein skimmer, powerhead, and canister filter. I would like it to be a fish-only aquarium. Thanks!