A new tail boom can make your Heli look very cool.
But they can also make it fly better.
You will find many different tail booms to pick from.
Look them over and find the one you like and try to find out what other cx2 flyers are saying about it. Most tail booms are going to look better than the stock one, you will get rid of that toyish look.
A thin CF tail boom will help flying in the wind a bit.