What do you mean by "all around use"? Spots? 3D? Hunting? Bckyard play? They can require different things unfortunately. For me an "all around" would be about 18", but that would be different for everyone. More details and perhaps you'd get a better answer. Myself, I make them. So I can just switch to a different one for a different shooting venue. I don't think just one would cut it for me.