Right now I am comparing rackets, because I will buy a new one. Confuse between NS-9000 and AT-900. Just curious: -Why Yonex back to AT series after they made NS series? -Is the AT-900 made only for LD and TH? I didn't see the other players use it. -Is NS not goed enough? -Will Yonex continue with NS or AT? Plese give me your opinions.