Well IMO a good reef tank should not be without a skimmer. I would also consider you running a sump just so you can incorporate a fuge to prevent algae outbreaks in the DT. Get some live sand and live rock. You dont need to get all live rock, and get some dead rock and just seed it, but either way you should have some in the tank for BB population. Sand depth should be about 3 inches unless you want to run a DSB.
A light that can grow and wide array of corals would probably benefit you as well. I would look for a T-5 HO or VHO kit.
http://www.marinedepot.com/ps_ViewI..._10k_3_460nm_Actinics_48in_Units&vendor=.html
Would work out great for that tank. Has a good number of bulbs in it and it will grow most corals, possibly even clams depending on the par levels.
A good skimmer IMO is a ASM G-2 which would work great on that tank, only if you ran a sump.
Adding a sump will also give you more benefit to the tank just in ways of water volume increase. helps keep your levels more stable then they might already be.