I don't think there is a best wax. There are a lot of great products out there. I use Zaino and have for almost 10 years now. Its easy to use, a bottle of polish lasts me a good six months and I polish two cars, mine and a Mercedes C240 once a month, every month. I also use their Detail spray, Z-6. As for car wash I use Meguiars Gold. Of all the stuff I have tried (I used to use dish detergent and there is a big difference) that is the best. There are a ton of fine wax companies out there and I think the key is find a product that works for you but DO use something and do it regularly. I had a neighbor come over to me a few years ago and ask what I used on my car to keep it so nice? She and her husband wanted to make their Sebring look like our cars. I laid out my whole program to her and it is a program I stick to. I'm the nut you see out there in 34 degree weather washing their car........... she listened but didn't do any of it. Too much like work I guess. That's the other ingredient you have to understand in all of this, its not just the products you use you have to keep it up.
I'm getting ready to do my spring cleaning which will include Claybar the paint, cleaning the backs of the wheels, Re painting wheel wells and brake calipers and other things I have painted on the car. So there is a lot more to it than what wax you use.
Good luck!