I run sunsun model 304A canister with 4 trays and 500gph flow rate ( 200-250 real measured Gph flow after installation in the cabinet ) for 1 year and im satisfied with it .
I've paid only 70 $ for it , and IMO ,nothing can beat that price .
Only thing to be aware of IME are the dirt cheap and thin PVC parts / screws and rings that can break easily if force is used during handling.