What Racquet is Best for Me?

I am 13 years old and have been improving rapidly in tennis recently according to my coach. I am looking for a racquet that will help me improve my game. I can generate my own power but I need a racquet to help me get some more accuracy on my shots. Perferably an oversized but any thing over 100 square inches will do. I am willing to pay up to $180 AUS. Please someone help me, I am too confused and need some outside help. PLEASE!!!!!!!!!!