I will post up in favor of the Avon Venom X - even though I have never ridden on Metzler tires, which I hear are fine. I swapped out the OEM Dunlops for the Avons: the difference was immediately apparent -- better handling, better cornering, better leaning, smoother movement, and an extradorinary reduction in the effect of groved pavement (the Dunlops walked all over the groves; the Avons simply do not notice them). All this said, others may steer you to the Metzlers, and I have nothing negative to say about those tires. But I do know the Avons are great!