I just upgraded my tyres o my Agility 50 a few weeks ago after coming off in the wet. I looked at the Michelin Pilot Sports and also the Conti Twist Sports, but ended up fitting Bridgestone ML50 Molas. Straight away i felt a difference, more solid on the road and even the ride felt better. Only just scrubbed them in so not been pushing it too hard on bends so far but they definately feel more grippy in the dry. Typically, since i fitted them it hasnt rained yet so im not sure on wet riding, but they got a good write up for the wet, thats why i chose them.
Its been wet today so will see how the do going to work tomorrow if it stays on.
Would def encourage a tyre upgrade if you have de-restricted your scoot,if your going faster you need better grip.