The Metabo I acquired from jesselyons2002 was well worth the purchase. I don't have any experience with other rotary machines but I also have no gripes about the Metabo.
For reference, I started my experience on the Metabo with 7" (I believe) Propel pads (ver. 1) using a
Meg's W64 backing plate. I personally did not experience any thermal shutdown since I've used it but I did experience some pad hopping on that '89 BMW 525i (ridiculously hard paint) I started on and a '98 Ford Escort (paint seemed hard). However, the thought of using the Metabo on my Acura was an idea but I don't think I'll really need it if I can save my clear coat by using the PC instead.
I don't know... I might still give the Metabo a try on the Acura to see what it does.