Have you looked into Hankooks? Now OEM to many manaufacturers. I'm running their Evo12 for daily use and very pleased. Have similar hard sidewall to OEM NSX tyres and offer good allround grip / comfort / noise levels.
I've also had a set on my daily driver which has covered 32k on the same set and still have 2.5mm of tread left!!
HTH, Paul
Senninha
'Too many manufacturers today are obsessed with lap times and power outputs at the expense of emotion and fun' Colin Goodwin
S2 is signed by the NSX Project Leader Shigeru Uehara