Take a look at the
Workcycles FR8. It's a step-through made in the Netherlands and it's very easily adjustable. There aren't many US dealers, but
JC Lind in Chicago carries them and will ship.
They're not cheap, but they are study bikes with all the little Dutch details (stainless fasteners, center kickstands, chain guards, dynamo lights, etc.) that will last a really long time. Occasionally you can find one on eBay or Craigslist.
Workcycles FR8 City Bike