My advice to all newcomers into the world of saltwater: You should start with reading one or both of these books before you even start thinking about buying equipment or setting up a tank:
the new marine aquarium; Step-by-Step Setup and Stocking Guide, by Michael S. Paletta or
The conscientious marine aquarist: A Commonsense Handbook for Successful Saltwater Hobbyists, by Bob Fenner are about the best two books to buy on how to setup and maintain saltwater tanks. They will teach you a lot.
Research, patience, and top quality equipment, are the main keys to a successful
SW fish tank.
travie