Let's see, $4000 new bike or $800 30 yr old bike with loveliness a main criteria. I see the problem choosing as aesthetics of desire are somewhat independent of function.
you don't mention your size but it would determine frame type on Hunquapillar. I really don't see the need for multiple tubes when larger diameter satisfies the need for frame stiffness.
i wouldn't consider an old touring bike unless you're light, carrying a light load and LIKE building things up and have the time to do so.
the problem I see is you haven't picked a type of bike , ie. touring road bike or touring fat tire bike w rough road capabilities or load carrying needs. Once you do that the choosing gets better whether it's a rebuilt old bike, good value production or high end loveliness. Go back to the beginning, what will the bike be used for 80% of the time? Good touring bikes can be found for $500 tp $5000 but that doesn't mean it's optimum for your use.