Personally I feel canister filters only add extra (unnecessary) work to a tank without much benefit. I haven't used one in probably 10+ years so I'm sure they have made improvements, but i always remember the drag it was to open them with out getting water everywhere, and then changing the media was a whole other hassle.
IMO you best bet is a simple reactor (like two little fishes phosban reactor) for simplicity in maintenance and function!