Uhm if he goes with the Tein Full coilover it is the shock and spring or strut and srping all together.
I have the Tein HA's and they are badass. They are stiff but i knew that and still went with the HA's. mine were $1500 installed but this was like 2.5 years ago.
You have to jack the car up and take the well off to adjust the ride height, to adjust the dampening all you have to do is turn the knob at the top of the schock/stut towers under the Hood
, the rear are harder to get to but it is still very easy