I got a (used) Bruko longneck soprano the other day and I think I get the whole longneck thing now. As it's also one of their arched back, "flat" ones, I think it will be a good traveler.
Now that you come to mention it, I've been playing chords up the neck a bit more often lately. Although it's doable on my Brüko soprano, a longer neck would give me a little more space to squeeze my fingers in to. When I have the funds I think I'll give a longneck a try.