Currently running on Avon Storm 2 Ultra's and got to say wonderful tyres for this bike...
As for lifespan, I'm currently doing 1000 miles a week so no doubt I'll find out soon enough...so far 2500 miles in with no noticeable wear. Excellent grip wet or dry, top marks for comfort and stability.
Good blend of sport and touring.
Would rate these tyres as better all round than Pilot road 2's as the Michelin's feel too stiff on these machines...