Meguiar's Dual Action Polisher is called the G-100. I have one, it's great.
It has a LIFETIME guaranteed from
Meguiar's. I've not needed to call
Meguiar's , but it's nice to know that they will replace the G-100 if I have any problems in the future.
MOL has a whole forum catagory for the G-100. IMO, it's worth the extra money to have the lifetime guarantee. Make sure to get the polishing and finishing pads while you're ordering the G-100. They have a buffing pad three-pack that's a good starter kit.
Peace.