I swapped out my front tyres for Michelin PS4's this morning and from my initial short drive the difference is night and day. No wheel hop turning off my driveway and so much quieter when cold. I've only done around 20 miles so far but there's a couple of places where the turns are very tight and the noise and sensation was very evident on the Pirellis. The PS4's appear to have reduced this to barely noticeable or even eliminated it entirely. I need to put a few more miles in before I can say its gone completely.
For info, the Pirelli's lasted for approx. 18 months and 12600 miles but were pretty much like slicks when I had them changed

(I forgot to take a photo!). The rears have still got a bit of life in them but I'll change them when I have some time off nearer Christmas to match the fronts.