Mothers is my preferred choice, probably because its all I have ever used.
soon the washing will drop back to once a month :D
with the waxing it really depends on how often you want to do it I guess.
Like Matt said it rains here nearly every second day so I dont put to much effort into it, I will only wash and dry it.
When going out to impress I will use the full mothers system, Wash and dry, Pre wax clean which removes old wax etc, seal and glaze which "adds depth and shine", then finally Wax. The whole system takes me about 2.5 hours and is very tiring but the resullts are worth it. :)