My advise - buy Meguiars first or whatever is on sale!
Try to avoid combo products like wash-n-wax but if you don't want to spend all day it is ok to use a cleaner wax. Also remember that polish is not wax and offers no paint protection. Polish is the step between washing and wax to eliminate swirls, water spots and brightness then followed by wax. Never use a hand circular motion - only use front to back motion. Get everything like wash mitt, polishing cloths and drying towels in micro-fiber or synthetic chamois. Real leather chamois are good but do not last. One of the best drying cloth is "Water Sprite" - but it is hard to find. Do not buy the "Absorber" synthetic towels or the ones that feel like rubbery cloth especially on a Black car. Good Luck!