Especially if we are looking for life in our Sol system beyond Earth.
And that is what these missions are really all about, because if we
were just going to another world to explore it for itself, then we should
be sending a combination long-lived balloon/lander mission to Venus.

It is a shame that we have to choose, because Titan becomes a more
fascinating world every time Cassini flies by it.

But since these missions are mainly about finding life, then Europa is the
most logical place to go in terms of the outer Sol system. Titan may
have life, but it would be very exotic from what we know and finding
that will require a more sophisticated mission that what we can do at
present.

Enceladus is also quite interesting in itself, but while it may be a
relatively nice place for simple life forms, we need to know a lot more
about it before we go dropping some kind of life search probe and end
up being another Viking.

Since this really is about finding alien life in our celestial neighborhood,
Europa is the best choice, perhaps even better than Mars. A world the
size of our Moon with a global ocean of liquid water sixty miles deep: I
can only see the combination of the distance to Europa and the
general ignorance of the public about that place as being the true main
reasons why we haven't had more missions to Europa already.

There is also a very good chance that life remains might be right in or
on the ice crust, so that we may not even have to drill down to find it,
though exploring that ocean is worth it alone, life or not. I wonder if
there might even be living creatures that have adapted to being in the
ice itself? Why not, ice is a good radiation shield and the creatures
would have an endless supply of water and minerals, plus each other.

There might even be Europan creature remains in orbit about the moon,
or circling Jupiter itself, ejected from impacts on Europa. Now imagine if
they have adapted to that environment.

Hopefully the economic situation is a temporary thing and we will have
at least one more mission to Europa in our lifetimes.

It is a shame in one way that more of the developing space nations are
not far along enough yet to mount their own missions to Europa, Titan,
and elsewhere. Hopefully when we no longer have to rely on just one
or two space powers for such expeditions, we also won't have to wait
a lifetime to see these new worlds up close.