A calfo manifold on your tank would be pretty cool assuming you had a way of hiding all the plumbing (i.e. under a canopy). Using one of your PS4 pumps and having a 4 port manifold would be pretty sweet. I see you have a SCWD too which you can use if you wanted.
Gyre tanks...well, while the concept is interesting, they look kind of....gross to me
Not my cup of tea.