"middle of the pack"? Me thinks you give UNM too much credit. I think 'Scats, Griz, Wildcats, Bengals, Lumberjacks, Hornets, Aggies, Vandals and possibly the Eagles ALL beat UNM...
I was going by Sagarin Ratings, which puts New Mexico directly as a "Middle-of-the-Pack" Big Sky program. I do believe that all the teams you mentioned would beat New Mexico most of the time.
94 Montana
102 Montana State
112 Idaho
115 Sacramento State
133 Weber State
136 New Mexico
139 UC Davis
162 Northern Arizona
175 Idaho State
178 Eastern Washington
201 Portland State
213 Cal Poly
234 Northern Colorado