We have a Wayback Burger locally near me. Apparently, they haven't made it to AZ yet (perhaps a franchise opportunity for someone?) but there are some in Cali.
Good burgers and shakes and not too overpriced. Although I've never tried one, they do have a triple-triple (yes 9 patties) for those who would like to attempt it. They occasionally have competitions on who can eat one the quickest (blech!); in fact, I think they are having one next week.
Like Sniper, I've gotten away from burgers, but I'll still have 1 or 2 a month, so if I'm gonna have one might as well be a gourmet (pricier) option.
Now, I did like the ostrich burgers at Fuddruckers (when they were available). I haven't been to one since I lived in NJ (about 9 years ago), but they are opening a new location locally on a road I use on my return home from work, so I may switch to them for 1 of my 2 burgers in those "burger-heavy" months. Apparently nearby locations have started offering Elk burgers as one of their exotic options, so I'll definitely try that out at some point (once they open).