I'd love to have n + 1 bikes but I don't have room for more than 1. If I did, I would use the Sherpa as a daily use bike and keep the Nomad for touring. I don't have a car, so my bike is my main mode of transport - used everyday come rain, shine, or snow. Unfortunately at work, the bike racks are not under any shelter so the Sherpa is left outside in the rain more often than not. I take good care of the bike though, stripping it down about twice a year, re-greasing every thing, and giving the inside of the frame a blast of 'frame saver'.
One caveat for going rohloff is the fact that I have to send the wheel off to Germany for a service. Since I use my bike for everything, I'd be hard pressed to get by without it for over a week. How easy would it be to convert the Nomad to a single speed whilst the hub was getting serviced?