You may have already made your decision since you asked several says ago, but I would like to add that I used an EZ-1 to commute on for about 2 years. It was fun, and I never had a single problem with it.
The only reason I eventually sold it was I wanted a bike where I could recline the seat more. At 6 foot tall, the seat back was nearly vertical since I had to move the seat as far back as it could go to get good leg extension.
Just something to think about.