CB I mounted a 2-6 after many many years of catching crappie. The next year I caught a 2-8 and had it mounted. It took another 4 years before getting my first 3-1 crappie, mounted it and the next year caught a 2-13, mounted. All of these crappie to me look just as good as the others I also mounted 3, 1-4 crappie that I had plans to mount on a cedar tree for maybe a corner of my game room but just never did but all the crappie look good on the wall together.
A mount is never wasted and I can tell you where each one was caught as each one has a story. Never feel bad about catching a bigger fish after having one mounted, we only go around once and big slab crappie are not caught every day. Like Tim said, I have caught many fish over two pounds and most times I don't stop to weigh them but you know when you are holding a real slab crappie