I did exactly what you just did 2 months ago. 2010 GT500 to 2013 auto.Thinking about trading my 2010 gt500 for a 2013 5.0 auto. Im tired of the stick and have knee problems to boot. Love my gt500 but I dont drive it much because its to nice of a car to daily drive in my op. So the quetion for the 5.0 owners on here, would you buy another 5.0 after knowing what you know now ?