I've known one other adult male who had his name changed, and I find your thought process to be far superior to what I knew of his! I've also known folks to snivel about how having a particular name had somehow held them back in life, which I find ludicrous, but your motives seem pretty solid.

You will probably find the "social acceptance" part of it to be even more difficult than you imagine, but if it means as much to you as it obviously does -- do it. Especially if you feel it could become something that you look back on and say, "I wish I'd done that!"