reeeet,
dependant on purse strings and if its just for 'the look' then you can get a lowering spring kit, which is only springs and go onto your existing dampeners etc, usually around £150 off the interwebz!
next up is the spring and shocks kit which looks similar to your existing setup but improves handling and lowers the car usually about 20 - 30mm. GOOD kits are usually about 5 - 600 sheets for your car.
the last option is coilovers where as the name suggests the spring coils tightly around the strut, these are usually fully adjustable height and dampener wise and give the car alot more 'feel' than the other kits mention, used on track and street! price wise looking at a couple more hundred on top of the above price for a good set.
HTH