Same set up I'm running. From recent understanding, don't worry about massive flow through your sump. Just enough to feed your skimmer and fuge. Flow in the dt is by power heads like the korailia evo's. It took me the weekend to figure out how to get my 1200 gph
to be almost completely silent with my danner mag drive 9.5 pump.
That said I may tinker with it more by adding 1 gate valve and trying to do more of that ultra silent overflow set up that I mentioned earlier.
If you have questions with anything I would be more than happy to help if you keep this combo.