That footprint gives you a great opportunity to maximize your $$$$. Do some good research and try to decide what kind of "reef" you think you're after. Mixing corals poorly, in that size footprint, could cause lots of headaches down the road. Good luck, and really enjoy the process.
That is a real nice footprint for a first tank. It is just shy of a cube which alot of us dream about . Good luck, have fun and enjoy your new addiction.