If you want a new colubrid you could look into Pits-Bull, Pine & Gopher snakes. They're a little larger than kings but the husbandry is pretty much the same. They can even be kept a few degrees cooler. You could also look into carpet pythons. I've added two carpets to my collection recently and can't say enough good things about them. They make beautiful display animals. The husbandry is pretty simple too.