I like wet/dry filters. I think an internal overflow looks a bit nicer, and is a bit less of a headache, but you'll have to find someone to drill the tank for you. If the tank has a tempered glass bottom they won't be able to drill through it. They could probably drill through the back panel though as sides usually aren't made of tempered glass. That said it may be esier just to use a HOB overflow box. I don't think they're that big a maintenance issue. Although periodically you want to clean it out to make sure that you don't have algae growth inside that will slow the drain down.
For lighting, you'll have to be more specific about what you want to keep. "Anything you want.", or "everything", really isn't specific enough.
With that, about the only thing people can do is tell you to go with a metal halide setup with some type of actinic supplimentation. However it's more difficult to tell what size metal halide rig would be appropriate. That depends more on the depth of your tank, and if you want mainly a SPS tank or not. If your'e not interested in SPS, then you can probably get away with vho, t-5, or a pc setup. In that size tank you're not going to be able to do an extensively mixed tank. You can either do softies, and LPS with possibly a few of the easier SPS, or mainly SPS, with maybe a couple LPS, and maybe a couple softies if you can set up your aquascaping so that there are some shadier areas where they'll be a bit more protected from overexposure to the light.
B