Just get the Porter Cable 7424.
At $119, its a good deal and I almost ordered one, but now that I have seen some others, I prefer the handle that goes over the top of the unit like the Griot's or Flex.
The Flex is a great machine, and once you use one you won't want to go back to anything else. More comfortable to use and much better performance than the PC. Having said that, it costs quite a bit more than the PC. The PC is a fantastic machine for the price, you really can't go wrong.
