I'm a post op M2F.  I realize that that is just one of the many things that differentiate me from others.  I tend to walk my own path.  Sometimes there are flowers on that path and, sometimes, not.
If I am denied marriage to a woman because I am now, both outside and inside, a woman, I would consider doing something, er, unthinkable:  Presenting myself as male, just for a day, to marry a woman I TRULY love.  I would want her to have all of the normal things couples have (including part of my pension and social security should I die).  If this breaks the rules of being a post-op transsexual, so be it.  Rules (like anti-gay marriage amendments) are often made up by only part of society.  It harkens back to the worry some of our founding fathers had about our country:  They feared that popular elections would lead to "mob rule."  By subverting their "rules" and posing as a man for one day in order to give my life's love what she deserves, well, that's, to me, a small price.  I might have to change my name to a non-gender specific name -- something like "Chris."  I realize most will disagree but, given the odd rules society comes up with sometimes, I feel it is my Don Quiotish side, bashing those windmills, coming through.  
Ready or not.  I might 
Teri Anne
P.S. - No, I have no plans on changing from F back to M for any longer than a marriage ceremony would require.  I'm very happy as I am!