Go ahead and have a good bike painter do the finish, and you'll not lose any value and have a very pretty bike.
I've seen enough of the same bikes both in pics and then in person to know that they always look worse in person than in pics. Even beater bikes can look very good in photos, so if a lot of problems are evident in the photos, it probably looks a lot worse standing in front of you. It's not an incredibly rare, one of a kind bike, so paint it and be happy. I wouldn't powercoat, though - go through the trouble and expense to get a good wet-paint and clearcoat.
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"Love is not the dying moan of a distant violin, it’s the triumphant twang of a bedspring."
S. J. Perelman