I've using the Kayanos from 4 years now. I'm very pleased with them. I'm overpronator
Good stability, support and comfort. Good for training and racing.
About racing, the last years there are new lighter options, you can try.
And for Triathlon, I recommend replacing standard laces for 2XU Lace Locks (<a data-hook="product-link-linked" class="a-link-normal" href="/2XU-Lace-Locks/dp/B004MNXEBS/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">2XU Lace Locks</a>). Or any Quick locks