Did you pull those numbers out of your
The budget is approximately $3B for whichever project is selected. The choices are: Europa Probe, Ganymede Probe, and Enceladus Probe. Don't ask me why Ganymede is still in the running at this point.
Europa is half the distance and the probe could get a ton of additional data on Ganymede, Io and Callisto, as well as Jupiter before dropping into Europa orbit. The ocean under the ice at Europa has more water than exists on earth.
An Enceladus probe could have a dual mission to Titan.