I have Eibachs on my N/A. Ride is nice and firm. Drop is just right, I scrape the lip going down my own driveway, and some other driveways. I only scrape my DP on the speedbumps at school. Other than that, pretty streetable, with no worries about scraping alot. These springs are paired with KYB GR2's in the front, and Monroe Sensatracs in the rear. Overall, I like these springs.
On my turbo, I have RSR Race springs. Supposedly the drop wasnt supposed to be as much as the Eibachs, but it dropped it lower than my N/A. I can barely stick 2 fingers between the tire and fender. Ride is alright, could be more firm I guess? I have big exhaust piping so the lowest part of my exhaust is probably < 6 inches off the ground. I have yet to drive it around very far, except for on a flat highway, so I cant say whether or not theyre great. I feel I might have some trouble in some spots though, since Houston roads suck... I have these springs on Tokico Illumina II's with new strut mounts.