To clarify: the additional income would be put into savings to move my retirement up.
Further education would increase my mobility with my employer but I'm not convinced I want to move any higher in the organization I'm in.
Too many headaches for too little return. I like leaving my work at work at the end of the day.
What I was trying to get other opinions on, however, was the cost/benefit of school in the long run. With only 20 more years left until retirement, I'm not convinced added schooling would ever pay for itself.
A second job - bartending, doorman, whatever - would be another job I could leave behind when I walk out the door.