Beautiful bike! Given the condition I would list the bike and get your cash rather than make big modifications. Especially since you have a heavy duty tourer you sound happy with. As fietsbob said you have plenty of options for a commuter and it would be a shame to see this one get dinged up.

I have the same model and really like it although I've had some issues with shimmy if not loaded a certain way. I built mine up from a frame set so I felt no remorse customizing far from the original equipment.

Vintage tourers are hot items right now so you could get a prime return as is.