Angie,

What are you wanting to do with a bike and how much are you willing to spend?
Do you want one for basic transportation, or are you looking for a bike to help you get into shape, or both?

I'm pretty sure all of the bikes in that link would have to be tagged as a moped (which in many states don't have to be insured).
They will work as transportation, none will help you get into shape.
As far as reliability on small two-stroke engines go, they are the pits. I would highly recommend you search for a Honda Ruckus zoomer in the link but sold as the Ruckus in North America or Honda Metropolitan. We have a Ruckus on our farm that has serviced us well for years. All of our two stroke engines, from small weeding tools all the way up high tech aviation grade two strokes on a couple of ultralights, have been fiddly nightmares to keep running well. Those four stroke Hondas however, just start and go.

I would still say give the Curry another try. But you do live in big hill country and you may need more torque than a hub motor can provide. In that case I would say any of the Kalkhoff bikes would be your dream bikes. They are expensive, but the Panasonic systems have tons of torque and I've put tens of thousands of miles on mine without fail. Fitting a Stokemonkey to an existing frame would be a slightly less expensive way to have a good torquey bicycle.
The Stokemonkeys and Kalkhoffs won't be on the used market like the Hondas. New the Metropolitan is right at two grand, used they dip as low as $800.