We still want to use pedal power as much as possible, and only use the motor for larger uphill battles. The Rohloff is ideal for that. Plus they have a solid reputation for being strong and reliable. Too many gears? Maybe.
The Optibike SIMBB 29R looks really interesting. And their website shows a summer special offering 20% off. That puts it right in line with the Turbo S price. But the Optibike has even better power and components, at least in my opinion. Stealthy looking too. The SIMBB seems to be a pretty remarkable feat of engineering. I know it goes against my "no throttle, only pedal assist" qualifications. But I'm willing to give it a try.
My wife and I may need to make a road trip to Boulder, CO in the very near future!

Update: What was I thinking? My wife reminded me that what we really want is a seamless pedal assist. We don't want a throttle-only control. She's right. I just got excited by the Optibike's clean looks, 600w motor, Rohloff hub, and belt drive. But, in the end, that's not the package we want if it's lacking the true pedal assist torque sensor system.