I have been using the HF $27 polishers last few years...they do the job, but don't do well managing the slow speeds needed at times. I splurged and went with the Dewalt since it has speed management and also am using the dual sided wool pads. Man, she is smooth, powerful and the speed management gives me great control. I really prefer over the HF's.
I have seen Drakes as well and he has great information and advise.
In my case, I have been loving the Majestic Solutions products. They are not over priced and are very good quality. They are a professional detailing company. I use their Supercut 1000 for the really heavy oxidized areas, then I use their CP2 cut and polish which is a finishing grit and the gelcoat feels like patent leather when it is done with a gloss like a piece of new glass! They have a CP3 which includes the wax, but I choose not to use any carnuba. I then switch over to the Shurhold Polish which is quick and easy to apply and has amazing gloss and seems to last longer than the carnuba's. Then I apply the Shock IT cermanic spray detailer which adds the hydrophobic properties so stuff does not stick and also adds another layer of protection.
In last year, now all I have to each season is use the CP2, Shurhold, then Shock it and done. Much quicker. As long as I keep it up, during season, every month or two just do a quick wipe with ShockIT and it is back to perfect as I can get. Applying the ShockIT is simple wipe on with a micro fiber towel, then wipe off with a new/clean microfiber. Quick and easy.