SAT is pretty warm this time a year. I concur with the B737CAPT. Sounds like SEDONA area in Arizona is nice, Northern NM is nice too around Santa Fe, and Sangre de Cristo mountain area, and even up in TAOS, nice and cool at night anyways. Try RUIDOSO in SW NM.
SLC does sound boring, except around ski season. I'm a New Mexico fan myself. Nice, cheap, interesting. The land of enchantment. Casinos in the reservations, great buffets. Easy to get around and very little people all around. It's quite barren out there driving around. I went to Ruidoso about a year ago, it was a wonderful drive from ABQ. Got a SUV cheap too.