Do you buy salon shampoo over the drugstore brands? Do you feel that there is a definite difference in quality? I will openly admit that I've used both and out of all the shampoos that I've bought in the past, the Organix line at the drugstore is my favorite. But of course, the stylists always want me to buy the salon brands. I'm just wondering if I'm the only one who can't tell a major difference between the salon stuff vs the drugstore brands.