R comp (R888) stiff side wall vs. street tire

[LS1-IROC]

Hey guys,

I currently have R888's on my IROC. Been running them for a couple years. I mainly bought them because I found a killer deal on them and was strapped for cash after my wheel purchase.

I love the overall performance of the tire, but since my car is 100% street driven now, I'm thinking of putting a more conventional tire on it. The question I have, will there be a noticeable improvement in ride quality with a more compliant sidewall? Right now I feel every stone in the road. Would like something a little more friendly for the commutes. Need a 335 series (18x12 wheels) tire for the back so that limits my choices.

I toyed with the idea of putting on a DR but don't want something too squishy back there either.