Which tennis racquet would be better for me?

I am 14. I want to get a new tennis racquet. I play at least 4 hrs every week. I play a defensive game. I run around and try to get to every ball. I am not a very strong person but I have a strong forehand and serve. Please choose the best racquet and explain why.

It's all depended on your game. Sounds like you're a baseliner if so, your're wasting your good serve. Go with the Babolat if you're a baseliner. You can get more power and topspin on your ground stokes. Stay away from the Plus if you could. Most companies are cutting back on their Plus models. You don't want to have to switch back to standard length when you get older and better. To make good use of your strong serve, you should improve on your volley. For volleier, you may want to go with the Youtek or Wilson.