I would drop the chemical guys pads and the backing plate for 52.84 and get this instead, it has 2 cutting and 2 finishing pads both microfiber, a 5" backing plate, D300 compound and finishing wax, and an apron for 59.99. This system is very easy to use and gives great results.
You can get Amazon to price match the porter cable which is currently on sale at autogeek for 110.49 which will cover the difference on the 7 dollars extra for this kit.