Can't go wrong with a Motobecane. I inherited my dad's after he quit riding and turned to swimming as his daily exercise, and I've outfitted it as more of an upright. I've got the hybrid comfort/off-road tires, mountain bike handlebars, padded seat with anatomical cut-out. The Motobecane should come with a nice spring under the seat which will save you a lot in terms of shocks and jolts on the road. I'm sure you'll find it's a joy to ride, and you'll probably turn heads when you ride it out in public!
I would just make sure you don't get one with the shock absorbing fork. Some of the newer Motobecane comfort bikes have the shock in the fork, but you'll probably lose too much in terms of speed and power to make it an effective commuter.
Whatever you decide, I hope you'll come back and post us a picture!
