Weight & speeds
Paul:
26 years? Why would you consider anything else?
Perhaps because Porter Cable no longer makes circular polishers.
Unfortunately their DA polishers, like the 7424, do not perform on gelcoat like a true circular machine does. One of the best electric DA's is made by Flex a German company and from what I have heard they do work ok on gelcoat but are quite expensive. I have not personally used a Flex DA on glecoat though so I won't make a judgment on performance. I have tried the PC 7424 DA on gelcoat and it basically just moved compound around.
Dewalt 849 = 8.25 Lbs. Min speed 1000 RPM
Makita 9227C = 6.6 Lbs. Min speed 600 RPM
600 RPM is a very useful speed for novices and it's hard to find a durable circular buffer at less weight than the Makita..