I had on Michelin cup 2's, cost £800, but, they took nearly two laps to start gripping, then went off afTer another 3, and, despite using pressures recommended by other Exige users, the wear was so far on the side that the arrows were rubbed off! Seem to be wearing ok though, as have done 3 trackdays and a 1000 miles so far.
God I miss my 888's though, and my great suspension, oh and my vx seats, and the, the list goes on a bit so I'll stop now.
Martin S