Tyre pressures on MY01's 17 inchers?
 

What should it be? 34 Psi? can i go a little higher for a more solid ride without compromising grip?

According to manual and plate inside driver's door, should be 33 PSI front and 32 PSI rear, whether heavily laden or not. I'm sticking to these recommended pressures.

Hmmm....

Well when I bought them, they were 37PSI all around! Felt great, nice and sharp steering although never put on the limit on a roundabout, but felt effortless on the motorway.

Now down to 34PSI all around, tramlines a little in a straight line.