Personally I'd go with a kit that has more pads and then buy the polish of your choice separately.
I know July is a few months away, but you might want to hold off a purchase until David (Autopia) releases the new PC he is having built (below is the link with info):
http://autopia.org/forum/autopia-car...g-you-out.html
If you don't want to wait that's not a problem, as a lot of us have been using the Porter Cable version for years. I'm sure there will be some things members like about the new one better, and some things they like about the current PC better.
If you do a search through this forum you'll see a lot of the PC deals that guys have bought or have had recommended to them by other members.