I have just replaced the original Yokohama with a Kumho as well, a KH27 Ecowing. It was slightly cheaper than the Yoko, has a fairly symmetrical tread design, better wear and wet grip figures but most importantly, it was in stock on the shelf. The Yokohama lasted just over 6000 miles. The front Avons look to be lasting forever now that the steering geometry is sorted, hardly any wear since then.