i did the same as you. droped my R32 about 2 inches and after about 4 weeks of driving i had blown the standard shocks. The seals split and all the damping oil came out. it was like driving a pogo stick around, and can be fairly dangerous.
I replaced the standard shock absorbers with Bilsteins and they worked a treat, however be careful with how low you are going to run the car, because i found it possible to bottom them out on big hits. other than that it was a sweet ride!
The shocks cost about $1300 and you can use all the bits off your standards - boots, strut tops, bumpers etc.
not a very hard job at all.