If you're looking into something low without sacrificing ride quality, look into the Stance GR+ with full coilover type rear. They have a fully threaded shock body and the mount design allows for damper body adjustment without affecting spring preload. I used this setup before I went over to the A'pexi coilovers.
Keep in mind that the more you lower your car, the more the suspension geometry changes/roll center is effected but since you're going to be slamming it I'm assuming you don't care
