I owned a 2015 stage 2 and after losing it and going to my z i wont look back. I miss the fact i built my sti to where it was but thats about it. The sti is built but its not as much of a sports car as the z. The stock setup on the z really has me wowed. I dont know what kind of driving you do but thr z takes the win in the fun category aswell imo.The huge inside alone will have you missing your z. The short gearing is also a turn off. 5 shifts to get to 120... the z does that in 4th. The list goes on. An 05 is also lacking the stiff chassy of newerish cars. I say no sir