I bought a PC when I was also looking at the G series and Flex/Cyclo's.
I am not doing this everyday 8 hours, I don't need to spend a fortune...what I need is something that works and that I can get the parts I need to use it.
Basically everything out there is made for the PC. The G series can share these parts, but at $50 more. It's all about price points. It's only $50, but then you can apply that to some more MF or a few more pads or more chemicals, and then what if you just spent another $50
I was into this for about $500-600 getting re-outfitted again...I could have spent 3x that easily and maybe saved myself a few hours here and there...but I had to draw the line.
IMHO learning to use whatever buffer you end up with and choosing the right pad/chemical combination goes a lot further than amp ratings and features. When you get really good and know your machine is holding you back then it's time to upgrade.
My next purchase will be a rotary. Mostly for friends cars. I am past the need on mine. I could have saved a lot of time with one on some sections.