Just some extra persuasion - if needed. I was the same as you, and didn't want to grind my rim 'cause it'd wear out - but then a friend advised me that: "A rim is replacable - your back, isn't." We put a grind on straight after that, and I felt the benfits straight away. Not only is the brake MUCH more responsive - the whole bike feels lighter. I didn't know why, at the time - but it's because of the lessened effort of braking. If it's easier to pull the brake, you can expend more effort on everything else. I was on a T-Pro, at the time - and it went from feeling absolutely horrible - to feeling really responsive, light, and easy to ride. Yes - you'll go through rims quicker... but most can take.. what... 10 grinds? Each one'll last about a month - or they do for me, anyway - so it's not that bad, really.