You already have one of the better rackets in the market. So I am also asking the same question as gundamzaku, why change when what u have is already an excellent one? Rackets is only 5% of the game, the rest is up to how well u play and how fit u are. I already tried more than 30 rackets within last 5 yrs n they are not that much difference. Heavier n stiffer rackets are more powerful but harder to manouver. AT900T is pretty much all around, a bit on the powerful side.