If you put any coil-over sleeve & spring on a stock shock it's going to ride like crap.

eBay coil-over sleeve + eibach spring = Ground Control

Don't do the Tein S-Techs, they are as soft as stock. They call them the "Dress-up Master" kit for a reason.

Fresh Koni Yellows with an eibach spring is one of the best budget kits you can get, far better than a comparable priced coil-over dampener.