I had my audi done at suburban, they will charge you a hourly rate if you have a modified suspension. My car has H&R springs, and I needed to get it aligned after putting in new rear tie rods. They charged me 1 hour labor = 80 bucks to do the rear which was worth the price. They definately worked on it for awhile to get it right. For a 4 wheel alignment it might take them 2 hours which is close to 2 bills, definately not a 4 hour job though.
I had my supra aligned at fox before I knew about suburban. The tech was pulling it out to test drive it, I jumped into the car with him and told him that I was coming along if he wanted to drive the car. They did a decent job on the alignment but I would not recommend them. Just go to suburban.