I've only had experience with Indian Runners, as I'm new to raising ducks, so they are definitely my second for you. They're relatively flightless, small, not so noisy, but still great egg layers. Also, they and the Welsh Harlequins are listed as 'recovering' in the US, so if you're looking to breed any ducks, you could help a really cool duck breed to thrive here.
From your list, though, I've read good things about Khaki Cambells.
From your list, though, I've read good things about Khaki Cambells.