Circulation questions

[MitchM]

Your main goal should be to use the circulation to massage the SPS tissue equally which helps them to process waste and not cause one side to atrophy. If you can manage a higher flow rate in the upper level and a lower flow rate in the lower level for your LPS, all your corals should be happy with that.
A reversing gyre over a few hours should work ok, as long as you aren't blasting the direction with excess flow.
I agree with IanWR with the Reeflo, if you restrict the output you will save a bit on energy.

Your tank's looking great, btw.