**** part springs are some of the better ones believe it or not!
Mate has had terrafirma springs for 6months and they've dropped an inch. Shock absorber snapped of the axle mount after two weeks. Bearmach are ok I think.
Britpart are getting better and terrifirma are going down hill. This is what I've been told from a major land rover specialist in the south here
I'm running britpart +2" springs with 1" spacers make it 3"
The paint will peel off them within a year so just hammerite them