You are like me (only older.... )  
  
I tried the S2K and liked the handling, the cabin was decent enough but once in the Zed felt at home.  It really is a decent GT (as my highlands road trip would testify!) as you can lop in a couple of suitcases, stick it in gear and cruise around on torque for hours on end.   
  
The S2K is  a good car, just doesn't suit me.  I don't want a frantic white knuckle 9k ride everytime I get in the car.  Without doing this the car sucks!  So in conclusion.  S2K slow =  S2K quick =   350Z slow =  350Z fast =  
  
Hope this helps!