Great post, Kash.
Definitely return to Saturn. As for priorities, Mars should be number one, however. Elon is sinking billions into getting a colony set up on Mars, they've found huge ice packs which can be exploited and I don't think terraforming is out if the realm of possibilities within 100 years. Knowing about other planets is important despite as far as we currently know, having little utility to us (although indirectly it does).
Good read!
Nick