What tennis racket should I buy?

Im currently a 9th grader playing on the school Tennis team. I use a Wilson Ksurge( a href="http://www.tennis-warehouse.com/descpage-KSURGE.html)" rel="nofollow"http://www.tennis-warehouse.com/descpage…/a but find that it does not give me the power and accuracy that I need. I was thinking about getting the Wilson BLX Bold (a href="http://www.tennisexpress.com/WILSON-Bold-BLX-Tennis-Racquet-20682)" rel="nofollow"http://www.tennisexpress.com/WILSON-Bold…/a but I'm not sure what racket to get. Thanks!