UK Ntecs really are as good as ppl say... but the rears require a lot of fine tuning of the suspension/pressures or you'll shred them to bits in 2 sessions or less. For some reason, the front seems to be able to take a lot of abuse. The best/worst part is that it will give you LOADS of grip even when you're destroying the rear tire so not that easy to know when you're on the bike. That means you can go out there, feel great on the bike and when you come back in it looks like Freddie Kruger visited your tire in its sleep. Well, at least that's what I found anyway...

You can get UK Ntecs from heaps of places, even Madaz sells them... prob not cheapest though.