I opted for canisters on my show tank and HOB's for quarantine or just on hand in case of an emergency. I like hiding the filter, I don't want to see it or hear it...plus lilly pipes look great on a rimless tank.
I could imagine maintenance is much faster on a HOB if you can stand to look at the thing :p
I run 2 overly expensive canisters the Fluvial fx-6 and Eheim professional 3e. I also have a Eheim classic that was much much cheaper and works just fine.
The Fx-6 can't be beat on large 100 gallon plus tanks. The Eheim 3e has a built in computer, it's pretty fancy for a filter honestly, some might say totally unnecessary. Some of it's features include a built in primer button, computer that controls flow/speed with manual adjustment, auto flow adjustment to avoid pump burn out if it senses filter obstruction, 4 stages of filtration.
I stopped buying the expensive filter pad replacements and just buy bulk filter floss, that's how I save money now after that initial investment.