There are more models appearing every year. I like the safety side of no prop but you do need to flush them daily. I owed a Ribtec Camel 6.5M for 6 years and loved the boat, it wasn't a jet but it rode like an old Cadillac, nice and gentle.
Check out
www.ribeye.co.uk and
http://www.espritnautics.com/ for Nouveranias