Hi! My daughter is 12 years old, 165 sm, 42 kg and plays tennis 6 years. Last year she played every day. I made a mistake and missed to buy her a new racquet last year. She plays with Prince 220g unstringed 26in. What racquet will you recommend me and do you think HEAD instinct rev (245g, 27in) is good choise? Consultants in the shops told me that she can't take heavier racquet then 250g and this model is good to take for next 1 year and then to take 270g. Are they right?