Dave at Dampertech knows his stuff, got mine from him and they changed the car totally. I bought the front 2 within a month of getting mine on the road, then changed the rears the following year.
I took my Missus out in mine and made sure it bottomed out, which scared her, she asked how I could fix it... my reply was to throw £200 at the front of the car, she said to do it. I didn't argue.
Nick