Both of those are very nice snakes. Much calmer than a Cal king all around.

I like the adult size of thayeri, very compact snakes, really easy to house. On the other hand, I like the bold coloring of the Ariz mtn kings.

Another wonderful kingsnake is the "mex-mex" or mexicana kings. In my opinion, they are perhaps the hardiest of the elevation-dwelling kingsnakes.

Good luck in choosing.