Here is a link to the hub I am thinking about...
Sturmey Archer
This is available as a 3, 5 or 8 speed but with a motor I think the 3 is good. I can then assist on long climbs like to Payson or Flagstaff or Mt Lemon down Tucson way. The brake would also improve a little.

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LennyHarp of Lenny's Bikes & Things
http://lennyh.com
The true value of a man is not judged by what he has, but rather by what he can do without.
"We are what we repeatedly do. Excellence, then, is not an action, but a habit." -- Aristotle