Since you'll have Ace at the house, I'd get suggestions from him, digest them, and then post your thoughts. Once you know where your holes/overflows are going, it might be easier to make decisions.

If you are going to do any type of wave box, you should plan for it now. If you are going to keep SPS in that tank, you should plan on a chiller.

Frankly, I'd have Ace build you a sump & fuge. He's very good at it, and you will be much happier with that than the 55.

I would, however, suggest an end calfo. I really, really like mine.