New to machine polishing....

[RedLight_Si]

Im planning on buying a Porter Cable 7424. I am strictly a Zaino user, so I will be using Zaino Z-PC Fusion. I have been reading alot on this site and am a little overwhelmed with info concerning pads, backing plates, adapters and things like that.
I have been looking into getting this kit:
http://autogeek.net/porter-cable-pad-kit.html
It comes with 2 orange pads which I assume I will use with the Z-PC Fusion?
It also comes with 2 grey pads (look black in the pic) which I have no idea what to use them for.(?)
From what I have read these pads are made by Lake Country,which I have read makes really good pads. I went on their web site though and they dont list a 5.5" pad,just a 6.5".(?)
Is there a better kit out there than this one? I only would like to spend around $150 for everything to start. A little more is ok as long as it is a good deal.

Thanks.
Steve

 

[Brenton]

I can't recommend these pads or that polisher, but wanted to let you know there is a thread (http://www.detailcity.com/forums/showthread.php?t=14489&highlight=manufactu*+pad) on comparing pads. The Orange pad is for polishing, and has some cutting ability to work out swirls and very light scratches. The Black pad is more of a finishing pad, your last polish once you've worked most imperfections out of the paint.