V6 Estate suspension

[warren]

eight year old estate 106k miles , rear suspension on 30psi tyres is like a brick, I know it is reputed to be a bit choppy but this is worse than an original Mini ,very bumpy ride on anything other than motorway, if i drop tyre pressure not much better but car rolls like a blancmange. When damp or wet weather ride is not quite so harsh which suggests rubber somewhere needs replacing. Front suspension too soft. Any ideas on what best to do - replace shocks and what else? and with what?