You service HOB regularly, so its only natural that canisters need maintenance as well. People often adopt this "out of sight, out of mind" mentality that comes back to bite them.
To answer OP, I'm a firm believer that Eheim produces the best canisters on the market, period. Their classic lineup (2215, 2217, 2252, 2262...) are work horses. They last forever, run quiet, move a lot of water, and pack a ton of media in a relatively small package. The Fluval FX series are decent, but have a laundry list of short comings that I don't like.