What tennis racquet is right for me?

I am 15 years old and am an advanced tennis player for my age. I play in competitive tournaments and I am wondering what racquet is best for me. I previously had a Dunlop Aerogel and I wasn't totally happy with it, not enough power or spin. I like to make hard topspin shots from the baseline with a lot of power without hitting flat bombs that hit the fence on the fly. I do not play the net often so II am not too concerned about my net game. I was wondering what racquets you would recommend and how I should string them, thanks