Just warning you, the Koni shocks are a bitch to put in... top knotch quality though, won't bust on you like the K-sports or anything like that. The Koni's are inserts in front, which means that you're going to be using the factory strut housing and inserting the cartridge. The rear shocks are also NOT externally adjustable, you have to basically take everything apart in order to get to adjusting the rear.
I'd say (imho) skip the Eibach springs and go with the Ground Control coilover sleeves with the Koni shocks. They use Eibach springs anyways, have a lifetime warranty (whether you race or not doesn't matter), and are adjustable height from 0" to 2.5" drop. I'd never drop that low simply for the sake of preserving driving dynamics and handling characteristics, but to each his own.
Koni's/GC setups is one of the best you can get for the money, despite how much of a pain that the Koni's themselves can be to put in. While not quite the ridiculous "30 way adjustable" parts like D2 racing, Megan Racing, etc, they will completely outlast them in every way. Lifetime warranty > one year warranty from most other coilover brands.
There definitely are some good quality coilover brands out there though. From what I hear, Tein's are good quality and won't bust on you, but I hear they're a little soft. Again, the suspension was on a track car, so I don't know how much damping stiffness is important to you. JIC Magics are also tough stuff as well.