I want to see a Titan Rover and balloon.
Titan is one of the most interesting worlds in our Solar System.
As far as Europa and Enceladus go, I would pick Europa. Why?
It’s a much larger world is 1940 miles (3122 kilometers), vs. Enceladus’ 310 miles (500 kilometers), and it has a larger seabed and a larger ocean. Enceladus is probably a giant drop of water with an icy crust and an asteroid size rocky core.