agreed on KYBs, and summit sells them preaty cheap. if you have high expectations, go to Bilstein at 2-3x the cost. Considering you have 20 year old GM car that's pretty much all stock, the Bilsteins are like like adding adding 13 gigs of memory an Atari.
Now if you are up for a full suspension redo w/ bushings, springs, shocks, control arm, ball joints etc etc, Bilstein may be the way to go, otherwise, save the money and enjoy your driver.