I would not shoot the buck! I may kick myself for not being more selective but, that's just how it goes!
In Texas we don't have a deer a day limit, but I had a situation a few years back that I had used my buck tags and was doe hunting. The biggest buck I've ever had in shooting range came out and worked several scrapes. I could have easily shot him and a buddy of mine that was hunting on another stand could have tagged him. That would have been illegal, I did not do it then and would not do it now!
Though I have never been checked by a Game Warden while hunting, and know that I could get away with it, my conscious would not allow me to look at an illegal trophy in my den for the rest of my life!