Me being a mechanic well im in training at the moment, spend almost every waking hour playing some kind of racing game from GT4 to LA rush if its got cars in it i have played it. One thing I look for in racing games is seeing how well the developers of the game have looked into the making of the game. Big named games that we all know and love like EA's need for speed series where you are tuning cars and racing cars for fame or respect are good games but they always fall flat cause you have completed underground 2 with your 250MPH bearing monster of a nissan 350z only to go buy most wanted and start with a car that looks and handles like a shopping trolly and by the time you reach a car worth driving like an Evo laner you just cant be assed to carry on playing and the game wastes away in the corner. But one game I have come across is RPM tuning its kinda old and the graphics arnt the best but it is a very good game in the way you costumize your car under the hood but if your looking for a game where you can make cars look pretty look else where.