So I'm after some 65z after my aerus are balding on the toe area after only a few months. 65z2 for £65 but I worry that the rubber will be older and less grippy. Or £30 or so more for the z3. The grip on the aerus was amazing, but i cant replace shoes that often! I tried my 2 year old P9200ii and couldn't get any purchase, so I think it's probably worth going for the freshest rubber. Or having separate training and match shoes, but that seems a bit excessive. Any thoughts or recommendations on going for older models welcome.