Hi. I have a 2015 Q40 as well as a 2015 Q60. The steering is nothing like the Q50. It is the same as the G37 in both coupe and sedan. No worries there. The Q40 is the last of the good ones. I purchased both of these cars because I didn't want an experiment at my cost. I purchased both of these certified pre-owned with 4000 miles and 6500 miles respectively. The Q40 now has 25,000 miles and so far bulletproof. The Q40 comes with fewer features that were generally available on the G37. The sport package with the ultra comfy seats, 18 inch wheels, the electric tilt and telescopic wheel, and memory seat,wheel, mirror option are missing on the Q40. There may be other things I may have missed but these are what sticks out in my mind. Look for the lowest mileage car you can find whether it be a Q40 or G37. As long as regular oil changes can be verified its mostly which options you are willing to do without. You have to find all of the Infiniti dealers within driving distance of your area and check their pre owned inventory often. A lot of people lease these cars and low mileage examples are out there and at the right price if you are patient. I got my Q60 last week but drove 200 miles to get it. 2 years old and less than 6000 miles!!!