 My wife drives 05 Lexus ES330 while I drive 05 Infinite Q45. I had chances to drive a loaned 06 G35x for total length about 4 weeks (due to services of my Q). I agreed as every one says so far. But 3 shortcomings  I have to mention: 1) Eng/Trans noisy; 2) hard suspension/very bumpy on the road; 3) steering is so tighten, you just cannot do single hand steering while turning. It is a great sport car, but not for family or long-distance commute. I had lots fun with it. For $38K, my wife and kids like the Lexus far better. BTW,I love my Q (100X better than G). If I have to spend $38K, I will buy a used Q45 for sure (diff btw Q & G is like day & night). Well, maybe not fair, for a Q owner to review G 