When I went from Hawk HP+ to Cobalt Friction pads the difference in braking was amazing! Tire compound can not be overstated either. But from my experience and from talking to others, suspension makes the biggest difference. Having fun is the goal :smile:.
Tires and brakes (pads, not a big brake kit) generally come before suspension.
The best suspension in the world won't make a bit of difference if you can't grip the track.