When I called about tank prices I explained I was thinking about getting a Eheim can filter. He agreed they were probally the best can filters around, but suggested going with 2 Emperor 400's. He continued to tell me that they are easier to maintain and would probally move more water. Another thing he said was he has had some in his store for 5 plus years and has never had a problem. Not to mention this option is cheaper. What ya'll think?