With PS3s all round, I run 44psi front, 35psi rear.
Final report in the end is that I was dispointed in the PS3s - wet weather performance being quite poor, worse than the PS2. The PS3 is still a good tyre, and doesn't have any 'nasty' traits - but I personally feel they are a small step backwards from the PS2.
So I bit the bullet and went for something different - Conti Sport Contact 5P . . . . . OH DEAR - what a mistake. Best I start another thread.