If you like the frame, I say go for it. You'll have a very nice bike.
Of course you could sell the bike for $300-400, add in the $465, and with your shop discount buy a modern aluminum bike with a carbon fiber fork that would be lighter.
But if you like your frame, I don't see any reason not to do the upgrade (other than the shimano hub compatability problem.)
You do know you'll need to coldset the rear triangle.
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.