This is the kit my friend has for his Challenger. He loves it.
http://www.chemicalguys.com/Black_Pa..._p/hol_201.htm
One of my good friends uses Zaino's stuff. He loves it as well.
I bought an orbital polisher from Harbor Freight for about $50 and it has worked perfectly.
I can't say enough good stuff about the Chemical guys stuff though. They have stuff for every experience level and price point.