my OE fitted were Current Generation Michelin Pilot Exalto PE2 : OK but not top notch imho
I recently fitted Michelin Pilot Sport PS2 Assymetric to the front and these are FAR better in terms of feel and grip.
Goodyear F1 Assymetric get good reviews but Ive not ran them yet (although the GSD2 and GSD3 I did run and they were fab)
How about another set of lightweight wheels (team dynamics)/tyres and a set of road legal track tyres (yokos R , toyos) etc ?