FWIW, Ive used Marineland power filters for years. I have a Penguin 200 that is the most reliable (knocking on wood) quietest unit Ive ever had. I make my own filter cartridges so that saves a ton of money because the Marineland filter cartridges (if you buy them at the store) do add up.
The Emperor 280 I have now is ok, it really processes a lot of water. However, it is noisy. I dont know if its just mine but its a really common complaint out in the big internetz.
An Aquaclear filter comes highly recommended. The media is very reasonably priced, it is supposedly much quieter than the competitors, and they seem to last a long time.
Its all personal preference. When my Marineland power filters give up the ghost, I may go canister or aquaclear. Heck, if they improve the Emperors to be quieter, I'd have no problem going that route either. I like the bio-wheels.
46 Gallon Bow F/W: 4 - Zebra Danio's, 2 - Red Platy's, 2 - lg. Silver Dollars, 1 - Pleco (4.5"), 1- Gourami, 1 - Cory Cat, 1 - mystery snail, 4 - Cherry Barbs, 1 - Black Molly