Fluval makes quality canisters, in general you can't go wrong with one, though there are other brands out there. It comes down to how you set up the media trays. With a 305 / 306 I'd say do poly fill in the bottom tray and ceramic rings on the upper two.
My 404 is a hand me down ... Over 5 years old and it's still running strong.
75g Planted Barbs Denison, BlackRuby, Tiger, Albino Tiger, Green Tiger, Cherry, Gold, Checkered, Odessa.
NonBarbs Cardinal, Neon, RummyNose, Bloodfin Tetras, Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, Amano.