I just went through this with my 96 SVT
Cobra. I bought used low mile Bilstein shocks & struts off Terminator owners who went coil over. New Bilstein struts are $200-230 each. Shocks $120. I paid $80 a pair for shocks with 5K miles and $175 pair for struts with 6K miles. Needs to really watch the sales forums on the big Mustang forums, they go fast. Also make sure the seller has a excellent reputation. I'm very happy with the H&R springs, also used 5K miles $165 all four. MM CC Plates $135 excellent shape, new urethane isolators from MM, and Golden West Suspension Full Length Sub Frame Connectors.
Rides like a sports car instead of a muscle car. I went used because I was working with a budget. If you have no restriction buy a Gripper Box from Maximum Motorsports. Has matching springs, shocks, struts, CC plates, with optional LCA's SFC's, and sway bar upgrades.