The car's two weeks old now with 400 miles on the clock, so decided to fit my Apex ARC-8 rims with Eagle F1 AS2 tyres (265/35 18/9.5" rears & 235/40 18/8.5" fronts) and take the 19" 326s with runflats off. Haven't tried them yet but I'm sure that the ride will be a lot softer! 
