I've been looking at GT500's for sale and I like the 07-09 models. I just can't get into the bodystyle of the 2010+ versions. I don't know much about the options or changes that were made from 07-09. Can someone tell me what changes took place form 07-09 and if one year is more desirable than the other? What were the factory options? Were there any engine or powertrain changes made? Were they all 500 horsepower? Were there any enigne problems with the 07-09's? Thnaks for any advice.