I agree that ideally I would like to get springs and struts/shocks or coilovers, however there are no aftermarket struts and shocks for the sonic yet. so that kind of limits my choices
coilovers are so expensive compared to Springs, which is why I brought up this question in the first place.
the LT with 15 inch wheels have been confirmed to have the stiffest stock dampeners.
the reason that I am considering springs is mainly for the handling improvement; looks (or "street cred") are secondary. I do try to autocross anywhere from 6 to 8 times per year, but even then 99 percent of my driving will be on the street, and no one has answered my question yet