Yay! I want one!
Mind you, I think I want the $80M first.
Seems a bit much for a luxury submarine, but then again they do start off at around $12M, so you can get the cheap version if you feel like it, and you want something left over for your own estate and stable of fast cars, private jet etc.,
Anyway if you want to see the list of luxury subs that U.S. Submarines makes, and you have the few million required, check it out.