Something else to keep in mind is that there is "Scale" and there is "Stand-Off Scale"

A "Scale" P-51 would have the original dimensions and airfoil scaled down, where a "Stand-Off Scale" P-51 might have slightly larger tail surfaces, or a longer wing, and almost always have a different airfoil. The Great Planes "Mustang 40" is a good example of a Stand-Off Scale P-51. These planes can make very good "3rd" planes, and they can help to satisfy your need to be flying a warbird.