Well finally gave up with tyre pressures etc, got totally fed up with the whole thing, drove to a local tyre dealer & fitted a set of Toyo TIS's. Problem solved, should have done it in the first place. Some people said the SO3 got better with time but how long would it have taken or is it just a case of you get used to them & forget just how good the SO2 was?

Also how much are a set of SO3 (205/50/zr16) with approx 1000 miles on worth, any thoughts?