My 05 GT had Eibach sport springs (1.3 fr, 1.5 rear) and original dampers, 28k miles and road like a buckboard.
I couldn't stand it.
I bought Steeda sport linear springs,
1 inch front 1.25 rear and Bilstein shocks/ struts.
Night and day difference.
Still a nice firm ride, no diving, minimal body...