Have a read of the reveiws on discounttiresdirect.com, I would put on the V12, oh sorry beat you to it I have already, and have two spares in the garage, be aware Hankook only make two batches a year, so can run dry, might want to get a few spare.
The review is by people that drive a lot of vettes C6, these come with Goodyear Supercar tires, everyone that has swapped to V12 has rated them better in every respect, despite ebing less than 1/2 the price, 996 owner "head and shoulders above"(Potenza SO3), 540i sport "outperform in every way the dunlop SP9000, rated way higher than PS2 also.
Sorry what were you saying phil ?
tabetha