Hey, it is yours and you can polish it as fast as you want to .....right??
Just kidding, you should get the Porter if you think you need a polisher. An alternative that I have achieved similar results is for $25, buy a Mothers (Yellow) paint ball. You use it with a drill and you would not believe the results. There is no way it can cause swirls if you follow directions and it is not hard to get used to. After you use it, clean with soap and water and you are ready again. Since I have had mine, my buffer never has had a need to come out again.