The PC is FAR superior to the other buffers from Pep Boys and stuff. I used my PC for the first time last weekend after making due with a Craftsman buffer for a few years. The Craftsman served me well because I didn't know any better, but the PC makes it look like a toy.
The speed and power of the PC are really nice as is the variety of pads for the PC. With the Craftsman I was pretty much stuck with whatever type of foam the auto parts store had. The PC opens up a much larger world.. Several abrasive levels of foam, ease of use of the backing plate (no silly bonnets that I'd tear when putting on), and I picked up a carpet brush to help me on the interior.
I'd say save your pennies for a PC.