Wax....

What are folks using? I bought a Porter Cable D/A machine last year. One of the best things I have ever purchased. I have been using Meguiar's NXT Generation Tech Wax 2.0 Liquid largely because that is what EZ, my friend/body guy suggested. I use a couple of different machine polishes from Griots Garage to clean up the paint on our daily drivers. Anyhow, not real thrilled with the life span of the NXT wax. So what do you fine folks use/suggest??? If it matters, one of them is red the other is silver. The red paint is pretty trashed, but it did polish up pretty nice recently....