Have Conti Twist Race tyres on my TS1, (can't rate them highly enough, even though they last less than 1,200 on the back) and Conti Twist's on all my other road going scooters.
Agree that Dexters were excellent all round tyres, but the speed rating on the Conti Twists provide that added reassurance now that faster speeds are being achieved (some of the time anyway

)