There has been this ongoing discussion on the Home Cooking board about cheese enchiladas and what goes on them. You can read it here: http://chowhound.chow.com/topics/645312
I don't recall having them with a chili con carne sauce, except maybe at Pancho's many, many years ago. To me that is what you get at restaurants that aren't really Tex Mex. But I could be way off.
Now I am absolutely craving some! Where are your favorites, and do they have meat in the sauce or not?