I have the coastal tool one. PC 7424 with 5 inch counter weight, remember to get the 6 inch couter weight because the kit CMA sells (with most other pad retailers) has 6 inch backing plates.
If you live near a Home Depot/Lowes, you can get a PC 7336 Sanding package, same polisher jsut different accesories (sp?.) You'll have an orbital sander and polisher.
$110 or so for PC, $60 for pads and backing plate, $170 well spent.
Jason
EDIT: Going to Home Depot next Wednesday. I'll check for the PC, I saw it last time (about 10 months ago) going for $104 or so.