It sounds to me like a recumbent is right up your alley. Extremely comfortable, and you will have an aerodynamic advantage on your husband. Kid seats and trailers fit bents just as well as uprights. If you don't want to do the recumbent thing, the RANS crank forward designs are the next best thing, look at the Fusion or the Zentick.

Don't discount the other Crank forwards either. I personally own an Electra Townie that I commute 24 miles a day. I had the LBS put a flat bar on it and Geax 1.25's on it. It's a bit heavy (I'm working on that) but it is very comfortable and pretty fast bike, compared to my Raleigh Technium which doesn't get me to work any faster but does leave my wrists and neck sore.