Interested in this also, need a major upgrade to my S3 brakes after going Stage2+. I was thinking vagbremtechnic grooved (not j hooks) all round, with new braided lines, Ferodo DS2500 pads and performance/race grade brake fluid. I don't think I need to go as far as bigger calipers and more pistons n stuff as I don't track the car (but wouldn't mind being able to do the off one), but more would like to be able to brake hard more than twice without them overheating and shuddering like my stock ones do at the moment