I had Falken FK452 on S2000 some years ago, it performs very well on dry and wet roads and fairly quiet, but the tread life isn't so great, rear tires lasted only 11-12k miles front lasted 18-20k miles.
I had Kumho ASX on E430, performance was okay at best, it lasted about 25-26k miles.
I currently have Kumho 4X on both S2000 and E430, it performs very well on both wet and dry roads, fairly quiet. I don't know tread life because both have less than 3k miles.
Of the 2 brands, I would choose Kumho.