There's really no reason to run coilovers on the street. Seriously, there isn't. If ride height is your goal there are other methods for that. Cheap coilovers ride like ****hole and dropping the car past one inch is actually detrimental to handling since it seriously pushes the geometry out of its sweet spot.
Coilover's main purposes are ease of changing springs for better rates and the ability to corner weight the car properly. They're not for ride height.. they're not for "stance" .. well, at least the good ones aren't.