Ok. Just to make sure Im understanding you correctly, do you mean a wash and wax as in a two in one product or do you mean two seperate products ?
The best wash and wax in one step is probably RainX auto wash with carnubua wax beeds.
As for a wash and a wax(seperation) I go for Meguiars products. Meguiars NXT car wash is good. I know, I use it. As for their wax, Im not sure. Ive heard good things about it but Ive heard it doesnt last long for a polymer.