All above is good advice. Plan on a typical civilian career path. Your professionalism, maturity and personal contacts will help to move your career along more than your Nav rating.
Biggest benefit will be to your SA as you work your way up the ratings/career ladder. You will be able to use more of your mental CPU cycles manipulating the controls because you won't have to spend much thought on navigation.
I'm a prior Herk nav as well. I don't add any of my nav flight time to my totals on my resume but I do list my duties in my work history. I thought it would engender more discussion. But to be perfectly honest, no one has ever brought it up during an interview.
Took me 10 years from Cessna to Boeing, but this is a much different hiring climate than when I started, YMMV.