Do you have a "Want List" of fish? Be sure to really research each fish BEFORE making any purchases. We all fall into the trap of buying something, and then finding out it's not really appropriate for our system. Learn all you can about each fish, it's dietary needs, hardiness, fish companion needs, reef "safeness," adult size, etc. Then you'll be making an informed purchase, and be a lot happier in the long run. If you don't have a QT tank set up, now would be the time to start thinking about one. A Rubbermaid tote, with a heater, power head and a couple 2" PVC fittings will work, though a small glass tank will work better, to allow you to inspect the fish daily, for any signs of problems.
Your lighting will probably limit you to Soft corals, LPS and maybe some of the lower light demanding SPS corals. If you jumped up to the 6 bulb Tek5 fixture, with individual reflectors, you'd be able to keep anything you want.