In my experience Jabsco pumps work, but have a fairly short lifetime in the kind of use they get on a boat where people live full time. They are cheap enough that you can get two and keep a spare if you like them.
My OEM fresh water pump had been changed to a Jabsco long before I bought Harmonie, and it was time to replace it again. I ended up with pumps made by an Italian company, Marco. They are gear pumps with a variable speed controller. Quiet, and smooth flow. Very few moving parts. Medium priced. Check back with me in 10 years and I'll let you know how they last!