I have a Dhp ls400, recently for the mot, I had to replace both front springs as one was broken, it still drove smooth and quiet, I couldn't even tell it was broken until it was mot time, so instead of just replacing one front spring, I think it was best to replace both, I bought kyb springs for £35 each, to be honest I can't tell the difference, it still drives very smooth. I'm abit anal so I got all the work done on the advisories, I was lucky with the rear upper arms, bought them from Paul on here.