HOB's are easier to clean, but toss a filter sponge over the intake of the cannister (or HOB for that matter) and just rinse that once per week. Now you're looking at a monthly rinsing of your cannister media, not too bad.
Actually, your reason for not wanting a cannister is one of the things I count as a big plus of them: less stuff hanging on the back of the tank, also, tank can be closer to the wall. Which is something else to think about: do you have room behind your tank for an HOB? I don't think that I would.