My opinion is pretty simple - do what you feel you need to do, end of discussion.
I will observe that the gay community has made the inroads it did by being "out and proud" so that people began to see gays as just other human beings. But I will also observe that this didn't require every single gay person to be out.
Finally, I will observe that there are different degrees of "out" to consider. I will state flat out that if you believe you can be 100% stealth and you transitioned any time since 1990, then you are completely kidding yourself. With the rise of the internet, computerized (and therefore searchable) records, our ability to be 100% stealth is gone. However, most people practice a form of "mostly stealth" where they are out to some but not to most. How large "some" actually is varies. That's where I find myself, out to close friends and family, not out to the world at large.
How I will feel about that as I move through transition may change and I reserve the right to change how I feel about being "out" or how "out" I am. But knowing this, I will never, ever condemn a sister for her choice to be out or stealth or anything in between. Each of us has to find our own way. That some of us are fortunate and brave enough to be 100% out is something for which I am thankful but also something I cannot yet bring myself to be.