Go on
www.liveaquaria.com and see what you like. Come back here and tell us and we'll let you know if it's okay. There's plenty of things that will go with clowns, more than we can just list out here.
Welcome to the world of salt water.
Few questions, have you ever used medication in your freshwater tank? If so, you may need a new tank as it could be deadly for the inverts (crabs, snails, shirmp, etc). Are you planning on a reef, or Fish Only? The lighting you need will depend on what you're going for. Many people choose Fish Only tanks and convert them into reef setups later down the line.