Sounds like you're already well on the way to "a new adventure with some real challenges" because you also mentioned your wife is pregnant. ;) But seriously, maybe wait till your 3rd little one is 2 or 3 before making any major career changes? I did a master's, it was well worth it for interesting parts of comp sci, and definitely opens some doors in terms of getting interviews. Not essential though. I did mine part-time. Not sure if its worth doing full-time as a more mature student.