I am on a full set of coilovers to get the stance, which allows me to choose my ride height. I am a firm believer in replacing everything in the suspension department if you plan to do a drastic drop or just get the most out of a vehicle. Bushings/Rubber wear out.
2" drop is alot and no springs really offer that except intrax, when paired with the bilsteins. SSC's are a good drop on the GXPs, but your ride will not be anything like stock it will be firmer albeit rougher