Go wet dry. There is more space to have different media compartments, and you can even put a refugium in there to help control nitrates a little better. Canisters are easy to do, and fast, but can't stand against a w/d. Another pro to canisters is that you can have the heater down here, which removes the possibility of the wire severing and having stray electricity in the tank itself. When the filter floss needs to be cleaned a canister has to be shut down, unplugged, moved, opened, cleaned and then put back. W/D you can just pull the section that needs to be cleaned. W/Ds have much better oxygen diffusion inside itself, and an air bubbler is not necessary in the tank. Canisters cost a lot of money, and multiple ones will be needed for monsters. W/Ds can be built completely around your needs, and cost a fraction of the canisters.