What is your budget for this project?
I'd recommend a sump, no filter. Filters in reef systems can easily end up being nitrate traps. A good skimmer and the largest size sump you can get will go a long way towards success. Live rock will offer all the bio filtration you need, and the skimmer will help clean out proteins left from feeding, waste, etc. A filter sock can be used on the drain line to the sump, if you decide you need mechanical filtration, though I have gone both ways and ultimately I have been running my reef for a couple years with no mechanical filtration.
What are you considering for lighting?