Recommend A Smooth Street Shock?

I have to agree with BigBlockMopar... Bilsteins or Koni's are good, and they last a long time. I have never had much luck with Monroe or KYB shocks.

Kill
Your
Butt

KYB Gas-a-just shocks are the Harbor Freight of shocks, SKIP them. Walk on by, they are crappy. Harsh on rough roads. KYB made another model in a silver color, I recall that they were a softer acting unit. Monroe did make some decent "grocery getter" shocks at one time.
Bilsteins, man!
Yeah, I don't know what I would get for a medium performance car either. I made the switch from KYBs and my car rode better and handled better on all road conditions.