Welcome,
Concerning brakes, I was very happy with the upgrade of stainless steel brake lines and changing the pads all the way around with Hawk HPS. The core brakes are good, the pads are just really bad.
The other big improvement I made with braking performance, is tires. I only put about 8K miles per year so I end up using Kumho ECSTA SPT. I only get about 25K miles out of them, but that is over three years. Good trade off for me. Tires were the overall best improvement.