I've used canister filters before, I think they can be a great asset until you have to take them apart to clean them. Minus the price tag on this bad boy, I'm thoroughly impressed.
4Minute YouTube Tour of the Eheim Pro 3e: http://www.youtube.com/watch?v=ye-ETO5m5NA&feature=related
Pricetag of one model: http://www.bigalsonline.com/edealinv/servlet/ExecMacro?nurl=control/StoreItem.vm&siId=3088247&catParentID=17290&scId=17290&ctl_nbr=3684&utm_source=Froogle&utm_campaign=FroogleUSA+Datafeed&utm_medium=Comparison+Shopping
4Minute YouTube Tour of the Eheim Pro 3e: http://www.youtube.com/watch?v=ye-ETO5m5NA&feature=related
Pricetag of one model: http://www.bigalsonline.com/edealinv/servlet/ExecMacro?nurl=control/StoreItem.vm&siId=3088247&catParentID=17290&scId=17290&ctl_nbr=3684&utm_source=Froogle&utm_campaign=FroogleUSA+Datafeed&utm_medium=Comparison+Shopping