It also looks like an audi in your avatar too
That lower rear is just the standard Liberty setup. To even the front and rears the best bet is height adjustable (not just preload adjustment - shock length adjustment) shocks - coilovers.
Tiens are probably the best you can buy within reason though they are still exxy these days with the dodgy Aus dollar (though brands like Ohlins make the Tiens look cheap). If you aren't going to be heading into the hills and are just going to wander around the suburbs however there are some cheaper options around.
Have a read of these two threads in the
Suspension, Brakes, Wheels and Tyres forum
G4 Racing Coilovers
G4 coilovers? Anyone have any experience with them?
They both start off asking about G4 coilovers but degenerate (as we often do

) into suspension and coilovers in general. Some good info in there IMO