Just did the drive from Boston to L.A., and couldn't find too much relevant info on the board, so here are my recollections from the SW (I've also posted on the Midwest board):
Anyone have anything to add/delete?
Cattlemans Steakhouse, Oklahoma City
Coyote Cantina, Santa Fe
Mattinas, Kingman, AZ
Tucumcari, NM Dennys may be the best there is.
Joe and Aggies Ca fé Holbrook, AZ