For A320, my understanding is that the Auto Brakes provide a deceleration rate. Whether you use reverse thrust or not, the rate of deceleration will be the same. Personally, I dont see the point in using revers thrust under normal circumstances. As has been said, you wont wear out the brakes any sooner by not using reverse thrust. Alot of noise, fuel, vibration through the airframe and mechanical wear and tear on the engines for little or no effective gain.