I just got my 9 year old daughter an O3 Hornet. What string would you suggest. She has decent power (for a 9 year old) and hits with average to above average amount of topspin. I am looking for a good all around string that is in stock at most tennis shops. Also, any suggestion on tension would be great. Thanks in advance. Topic should read "String Suggestions for Prince O3 Hybrid Hornet"