I am replacing my stock suspension (amazingly it is still original equipment - 160,000 miles!)

I was wondering if the setup I am planning on buying is a good setup? Its for a S13 HB

The Plan is to get KYB AGX shocks and struts, with Tein S-Tech Springs. It will drop the car about 1.5" (not enough to get camber adjustments) I am also wondering if I am doing the install myself, is there anything else I should get before I get in there and start finding all kinds of problems? For instance, would it be beneficial to get a full new set of bushings?