I just fitted a set of Bridgestone ML50 Molas on my Agility 50 about 2-3 weeks ago. They feel a lot nicer than stock and are meant to be more grippy in the wet, tho its not rained since I put them on so I cant how they do in the rain yet. Def feels better in the dry tho.
They were pricey at £50 each but I guess you can never have too good a set of tyres.
Michellin pilots and continental twist and twist sport also get a pretty good name, I toyed with buying them but went with the Bridgestones.