I still enjoy my 2007 G35S a lot. I found that commute time in G was a little bit shorter. I also found G was a little bit easier to drive (maybe because G is a little bit smaller) but GSF had higher limit (because of its bigger and better PSS tires)
Both GSF and G have similar MPG!!! Now I realize why many people don't buy Nissan 3.5 engine because of its MPG.
I also find that the shocks in GSF are already Sachs and built in German. So I think that those performance coilovers from Bilstein, KW, Ohlins, etc are very good but you need to sacrifice some ride comfort. I would not say their rides are good but I think their rides are OK if you're seeking for car performance like me.
