just caught up with the thread.
I recently moved from Potenzas to Falkens and overall I am disappointed to say the least.
the Potenzas were standard 18" while the Falkens are 20".
the only advantage the Falkens have over the Potenzas is the lower noise level.
apart from that the potensaz rates higher in my experience.
the Falkens give the car the tendency to understeer. even with 4 mm thread on them the potenzas will hold the front end much better and the feedback is light years ahead as well.
in the wet, the understear is even more pronounced and dangerous to an extent. with the potensaz and wet weather, the overall grip is marginally less but the zed tends to oversteer rather then understeer.
I know its a matter of personal preference, but I would rather have an oversteering zed all day long.
having said all of that, in a slightly better financial situation, my choice would be Goodyear asymetrics. from a recent expeience in an XKR, switching to asymetrics from Pirelli's mad the fat cat an all new car.