Air dried is better if you can find it. Difference between KD and Air dried wood, rip a board of KD on your table saw and you get saw dust. Rip a board of air dried and you get shavings. Most of the best stuff goes to instrument makers and for veneers. I was in Gilmer Wood in Portland, my first time there, and was looking at some highly figured woods. The sales man said, "you don't want to go in there, that is instrument grade wood."