It really depends on what you want to keep in the tank. If you think you might want to go with SPS
corals, clams, and perhaps an anemone later, then you should look at a MH
system. I agree with cj10488 that a 2x250w MH
with actinics would let you keep pretty much anything you wanted. You can choose from VHO
, or T-5 for actinics. T-5 seems to be the up and coming thing right now. If you only want to keep some of the lower light soft corals, then you could go with a 3x110w VHO
or a 4x65w PC
setup. The danger in this is that you will probably want to try some of the more difficult corals later and you'll have to upgrade your lighting to do that.
You shouldn't need a chiller unless it's really hot in your house. The heat from the lights can mostly be removed by fans in the canopy.