I agree with Foci_Fosho. Unless you wife plans on autocrossing or really likes spirited driving, she will probably never use the adjustability. The SVT kit does ride great and should last a good amount of time. If for some reason the dampers do ever go in the SVT kit, you can put the KYB AGX shocks and stuts in instead of the SVT's no problem.
As for how much labor...Best bet would be to call shops around your area and ask for a quote. You also may want to soak some bolts in PB Blaster since those are going to be a bear to get off (Mainly bolt on the rear LCA, tire rod end bolts and front sway endlinks). I'm in CT with 76k miles and PB Blaster was a life saver. Depending on how the rear lower control arm bolts are, you may need a new LCA if the shop decides to drop the rear LCA to do the rear springs. The sleeve inside the bushing likes to seize to the bolt if it has seen sand/salt winters.
The Vogtland springs you linked too actually shouldn't ride that harsh.
Spring rates:
Front: 125/154 progressive
Rear: 165/188 progressive
Progressive springs start off soft and as they compress, they get stiffer. They make for a comfortable ride and then when you push them, they stiffen up.
In comparison the SVT spring rates are:
F: 129 lb/in
R: 157 lb/in
The ZX3/LX/SE/ZTS rates are:
F: 110 lb/in
R: 117 lb/in
Those are linear as well so they are that stiff throughout their range.
Also, get a new set of front sway bar endlinks and upper strut bearings. They wear and if you are going to have them off the car, it's better to do it all at once.
Is there anyone local around you have has a aftermaket suspension? Maybe let your wife ride in the car and see if she likes the stiffness and get a setup with similar spring rates and damper combo. Just please don't get lowerings springs and stock dampers.
