SEOs or Closed Loop On New Tank

[TheReefGeek]

I would say closed loop for sure.

Because your tank is brand new, see if AquaGiant will drill and guarantee the holes for the closed loop, otherwise you can go "over the edge" with PVC in and out, cause it would suck to break your new tank.

The mag 1800 return + the mag1800 on closed loop would be plenty of flow for a 150g tank, you shouldn't need any powerheads.