The new S21's do look interesting. They've steepened the profile up front, which should help make them a handle a bit more responsively, and if they get anywhere near the improved life out of them they claim along with as-good or (also as-claimed) better grip, they will be a great street tire. Sadly I just put fresh S20 Evos on both my bikes right before the 21's came out in the States, so I'll have to run these off before I get the chance to try them out. Such problems...