i have 30mm from ss+ and big glass roof + all the toys and 215/40/17 rubber on ET37 on my mcs
so just about as bad as it gets weight wise
fine as a single seater, 4 up not good and would rather have std set up
in between flip a coin,
on the + side roundabouts are much more fun
i would like to compare with 20mm or jcw set up before making a firm recomendation, but i would guess they would be a better bet unless most of your daily drives are on A1 tarmac
or you have taller rubber or a lighter car than me, or your "billy no mates"
attached is parked on hill, but you will note a visable difference between front and rear clearence even on level ground