Sorry... I am a newbie with my only experience coming from what I have read. I obviously do not now exact specifics but I have a pretty good idea:
4- 90s(PVC)
Soft corals at first, eventually I would like a good selection of lower light corals.
As for the overflow I am not sure. I plan on an overflow with a Durso stand pipe. I do not know if this helps some...
Sorry I do not have specifics here, but I am trying to plan out my tank and its inhabitants before diving blindly into this hobby.