i've heard great things about the depth of p21S 100%, and have had good luck with lusso oro myself.
however, i've never experienced anything quite like dodojuice Supernatural. my friends are used to my car being clean and well taken care of, but WOW - got a lot of comments after using that stuff. amazing wax, and they offer it in the more affordable sample sizes (which i love, because i woudn't have shelled out 200 for something i've never used). of course we've all heard GREAT things about divine, and crystal rock, and i do believe what people say about them. i'm sure they're great. but SN competes with them directly, is cheaper, and i've had amazing service from dodojuiceusa.
and how has souveran not been mentioned as a contender?
my $.02 though i haven't tried as many as some others