Hey Josh, if you want to get into SPS I would also suggest Montiporas and "Green Slimer" Acropora. Put the Acro up high in the tank. Make sure your alk and calcium are good and these are easy SPSs.
I'd suggest the branching Monti rather than the plating in a small tank because the plating, given fair conditions, quickly takes-up alot of real estate; just my opinion.