Agree the delta between R comps like NT01 and super summer tires has dwindled to almost nothing. However, I'd say that sticking near/or pure slicks on just about any car will make it faster based on my first hand experience with not a very stiff suspension. I also believe Provoste tried slick scrubs and got more pace out of them with good balance overall? So personally I'd prefer spending $ on rubber vs suspension mods especially on a capable car out of the box like a 1LE. As to the ZL1 1LE I don't believe pricing has been published yet? At least I can't find any news on this subject. If you know what it is would you mind posting it? Dying to find out what the delta is
Cheers!