I say skip the canister and it for a skimmer. I set up my 55 as a FOWLR
without a sump and is worked great. But since I've also started a 29/15 sump tank, the idea of not having a sump seems silly now after trying both.
The canisters ESP with bio balls everyone told me to stay away from, they are apparently "nitrate factories."
Google image "octopus skimmer" there are in-tank or hang-on-back versions, the latter is used if you skip the sump.
The filters I use in my FW
tanks get dark and cloggy and I squeeze them monthly in tank water to keep the flow.
With a skimmer, you don't have "material" (maybe a sock or pantyhose its up to you) but rather a "cup" to collect skimmate. a small pump adds bubbles to the intake inside a chamber design which eventually makes a concentrated filth juice of every poop or rot happening that mechanical and biological filtration don't address.
Very layman's terms, but if you get a sump just add heater, skimmer and live rock.