I think you can mod the auto and still have a lots of fun. The platform is not as good as the manual for modding but you can still improve the performance and handling significantly over the stock car.
Personally i don't see the point in "beating" other cars. You can improve the performance of your stock ride but there's always going to be cars out there that will beat you. No matter how you tune the Euro it still won't come close to cars like the Stis and Evos in terms of performance.
