Well Rob it is six of one and a half a dozen of the other. Choose AZ and you have the Grand Canyon, Sedona, Painted Desert, Sunset Crater, Zion, Quartzsite and spring training all are day trips. Choose southern California and you have the San Diego Zoo, Catalina Island, Joshua Tree National Park, Death Valley National Park, Disneyland and Beverly Hills homes of the stars tours. And from both places you have Las Vegas, Hoover Dam and the Colorado River. Can't go wrong with either one.