Performance Friction
I'm not a fan of Porterfield. They just wear too quickly and wasn't overly impressed with their performance. Switched to Carbotech and have been happy since. This summer tried their pre-bed pads and that made things nice and convenient!
There's also Reybestos (sold by Porterfield)... I've had good luck with their ST-43 compound. Looks like they could go 24+ hours on my Civic EX. They're a high friction compound that does require a light touch to keep from having lock-ups.
Carbotech!!!
www.ctbrakes.com
-custom make you any pad/drum that you need.
-SCCA discounts
Carbotech makes the best pads/shoes by far, great modulation under braking, firm pedal feel...never fades, easy of rotors and easy break in process (none required if you purchase the pre-bedded ones)
Porterfield. Have always used them and they have an SCCA discount.