Consider your tire grip and heat when choosing your pads. All are a tradeoff but finding the best for you will be heavily influenced by tire grip. If you run street tires you generate a lot less heat than R-comps.
I run Raybestos ST-43 all the time street/track. The are fine for most street driving although sometimes sound like grinding when stone cold and sometimes a bit of squeal. They have a very high heat range to 1200F so they will never mush out on the track and are really in their element in continuous lapping with R-Comp tires. The fronts are also good for a full year including 20 track days and a few AX. Nothing holds up like these do. They are expensive similar to Pagid Yellow but I think far superior pads for regular track work on sticky tires.
This is an excellent resource for brake products. They know their business well and offer expert advice. They will also custom-cut pads for your car on request:
http://porterfield-brakes.com/images/raycomp2008_11_06_03_19_04.pdf
Lil Red
2009 Porsche Cayman 2.9L
Threaded Mode
