And your contribution to this thread is . . . .???

Yes 75s are Keirin approved racing cranks and therefore are much stronger and reliable but I have yet to see someone break or ruin a set of cranks under normal operation because they generated so much torque that the require something of that quality. Anyone who isn't racing on a velodrome and buys 75s or better is doing it for the simple fact of adding unnecessary bling to their bike. . . .which is where my comment applies. Buy what you can afford and are willing to spend.