OP
Looks like the guardian is the route I'm going. I tried on the guardian, ocean reef predator, and an aga. I liked all of them but the guardian and aga felt solid like a tool. I felt the aga and guardian were very close fit wise. The deciding factor was the cost of rebuild kits, the feel of the silicone double seal, right side hose routing, standard fitting to more easily switch out hoses for length or material.