Either route could work for you in some situations and against you in others.
I am seven years out of my MA and have built my career as a registrar moving
back and forth between art museums and history museums. What some may view
as versatility others may view as flighty. The most important thing: the
museums field, like every field, needs people who are truely good at what
they do. Belive in yourself and keep pushing for your goals. View all
setbacks as a temporary interruption to your progress. Good luck!