I own 2007 G35S(over 190K km) and 2017 GSF(only 5k km) currently. I still enjoy driving my old G a lot now. I would not say my GSF is not good. Actually I think my old G is too good and it lets me feel that my brand new GSF is not GSF anymore!!!
Japanese engineering is unbelievable...
PS: a. I've installed PSS10 on my G 1.5 year ago. The racing technology from Europe is also very good... b. All parts on my G are still factory parts. I bought it used 8 years ago and even didn't replace its sway bars links after so many years' spirited driving... (It has been through 3 coilovers KW, Koni, Bilstein. Why? because I drove it very fast!!!)