Mark,
A LOT of us use Porterfields in our cars, and we don't own stock in the company!
Every one is a compromise. You use what works best for you. I tried many and asked a lot of SDR people what they used and why. I can tell you that R4S for AX and street and R4 for track work great, and are a lot better than the others I tried. Normal 944's (and 924S) don't need or want the most aggressive compound in the world (too easy to lock up). On my Turbo, I use Pagid Yellow because it NEEDS an aggressive pad that can take the heat and still last on a track.
There are a few new ones that may be better. Porterfield themselves sell several brands. I don't want to waste time looking for better ones when I don't have a problem. If you do, then you can tell me when you have found a better one for the price.
You have a PM on where to get them.
