For what it's worth, I ran the gyre and sold it. It required constant cleaning to function properly. It was also loud. I've also run mp40s but don't like the giant wart on the outside of the tank. They also have trouble reaching four feet, IME. Plus EVERYONE that isn't a reefer grabs the dry side and says "what's this?", moving it out of alignment.
If I can make a third suggestion, the Tunze 6055 is small, amiable, controllable and reaches four feet easy. You can hook up a few to an apex and make them do anything you want or leave them on their own controllers. The icecap battery backup can run one for a long time if need be.