Wraysbury tyres (at Chertsey, just to confuse you). Come over the bridge from the Chertsey end and they are on the left, half way to the roundabout. Unit 1 Woodley Yard Chertsey Bridge Road Chertsey KT16 8LF Ask for Kevin 01932562299 They do the tyres for my Multistrada. Ride in and ride out. Good price aswell. You may have to pre-order the tyre.
Another +1 for Mark....top Bloke and always does an excellent job on all my bikes. I'll be going to him for the new PR4s in March to replace my Scorpions (not been very impressed with them TBH)...will report back.
I think your right about wet grip, PR have better wet grip and PP have better dry grip, the michelin web site qualifies the grip rating as "Grip Sol Sec" which means grip on dry ground. I had not thought about warm up times at all and have not noticed an issue with warming the tyre up, do you think that is because PR3 riders only have to warm up the middle part of the tyre where as PP3 riders use all of it?