Everyone here will no doubt say that the car they run is the best (after all, why would you be running a car that you didnt think was the best!) and most people have tales of woe regarding the car they replaced! - The best advice I could give would be to see what is the most popular at your local club. That way you will have a good source of assistance with spares and setups. Also, if you have a LHS check out what they sell/support.
HTH
