I guess they do feel quick, cause I had a kid with a ex35 up my azz on the hwy, and I really wanted to see what it was capable off, When we hit a long stretch I let him come next to me and we went off... I pulled a good 2cars or so on it with my first gen.
SO I'm guessing 1st gen FX, with (Test pipes/hfcs/ or ART pipes), Full exhaust, intake, manifold spacers, and Osiris or technosquare tune will hand ass to it.
If u want the quick feel, I think RWD 1st gen Fx, with like 3.9 gears will be pretty quick.
Btw anyone did gears on their Fx. change up the FD ratio.