Had the Griot's and switched to a Flex. Doing that will allow you to correct so much more.
I usually do a 2 step polish with 2 different pads, that have different cutting ability. I like Lake County pads and favor Mezerna.
In terms of which product, it depends on how much correction you need. If a car is in good shape, I'll just do a 1 step polish and save the clear coat
http://www.autogeek.net/menzerna-of-germany.html