re: Saturn or Jupiter
I don't know why, but, because of the reduction of radiation, mag/sun and otherwise, I'll go with Saturn's satellites. "The Saturn missions seem like they should be consolidated. Why not a few flybys of Enceladaus before going into Titan orbit? Maybe even releasing an orbiter around both? Obviously Titan would get the primary one but why not a short-lived mini orbiter around Enceladaus?
Since it will be 15-20 years at least before the winner reaches it's destination, I say get as much bang for the buck as possible."
Ta si.