I have not found any appreciable difference in reliability for freshwater use on bass boats. I agree on getting one designed with a replaceable cartridge. One you install one like that, you should never have to deal with the plumbing again to do a pump replacement. It becomes a 2-wire connection effort with the new pump installed in the existing housing. Be sure to get a brand name you recognize to increase the odds of getting a replacement motor cartridge years down the road.