What I'm looking for is the best choice for me under 1000 USD.
Don't need it to fold fast.
Don't need it to fold small -- just small enough to be accepted by airlines as non-oversized.
Want a good quality ride, or minimal compromise on ride quality -- like the Swift, perhaps -- but also quite open to other bikes, like various Dahons, and others.
Probably 20" wheels, but open to larger as well (wanting to stay away from smaller wheels, but still open to them too; have owned and ridden many 26" and 700C bikes, but never smaller wheels, and may use it at times off-road, though not extremely rough off-road).
Looking for light weight. The lighter the better.
Open to buying used.
Would much appreciate any helpful feedback from folding bike community.