Hi, I have an Audi A3 1.9tdi sport (130 bhp, 2002). Its done 80,000 miles and the brake pads need changing. I have also been advised to change the brake discs. I am wondering whether to stick to buying a set of standard pads and disks or buying sports pads and disks. How much difference will it really make? How much more expensive will it be and is it worth the money? As i am also planning on putting a revo chip into the car will it be better to get the sports pads and discs? Also whats the difference between drilled and grooved discs and which is better? Any advice will be appreciated. Thanks.