Get a different pair for regular boots and keep a pair for show so they stay nice. Also, you'll want to wait to buy a pair for showing so you can make sure they coordinate with your show outfit.
I just bought a pair of the Ariat Fatbaby II's... the black and purple. They are amazingly comfortable, deertan leather which is super supple so there's no "break in" period. And I can say they are definitely waterproof after a little incident at a shallow water crossing on the trails!