Also not spicy, but the "spicy sweet" chili Doritos are quite tasty. They're in the purple bag (if you can find them, Wal-Mart had last time I was there).
Definitely with you on the spicy lays being surprisingly spicy, and the flamin cheetos being much better in the flavor department. I like the jalapeno cheddar Cheetos myself. They're not as hot as the flamin hot cheetos, but tastier imo.