Aquarium Sponge Filter vs Power Filter. These filters are both great and have been used for many many years. I think it really depends on what you want the aquarium filter to do. If you like the sound of bubbles the sponge filters are great. If you want it to be more quiet, hang on back filters can be great.
Aquarium Solutions sponge filter: http://www.aquariumcoop.com/products/large-fine-sponge-filter
ATI Sponge Filter: https://www.aquariumcoop.com/collections/filters?ref=4