Here's the secret PC - if the HC helps perfect your DD's swing, it won't matter what kind of bat she swings - a good hitter can hit well with a whipit bat, a Walmart special, or the newest $300 "it" bat because it's all about the swing, not the bat. That's your goal. Reach it and THEN buy the "it" bat and enjoy the show.
ding ding ding, we have a winner. This post should be required reading on both of the batting forums and the equipment forum.