I was between joining Club SAR and Youfit and am glad that I went with SAR. It's even cheaper than the cheapest Youfit package, even if you're not a Scottsdale resident ($100 a year for residents, $150 for others). The classes get crowded but they make sure to work you in even when they're full, at least for the rowing class, which I appreciate. I've never had to wait for equipment but I'm not sure if I've just been lucky in the times that I've gone.
They have everything you need - free weights, cardio equipment (including erg machines), a boxing ring, punching bags, and a decent selection and quantity of quality group classes.