Like robster says depends on the £Â£Ã‚£ you have. Robster and I have both been looking and seeing what else we need.
The opinion was new springs, new shocks, new front mounts. Check your bump stops, rear mounts and dust boots and reuse if they are OK.
Other factors than price are how much you want to drop it, can go 35, 40, 60mm or adjustible (adjustible cost more).
I am going towards some spax springs and shocks but might change my mind.