well first of all it's not "core" it is "cor" and your best bet is either the Miken Freak 98 or Miken ASA Recoil (the red bat). Both of those bats are expensive and hard to get a hold of so you might also want to try the Worth Toxic (the white bat) or Mizuno Rusty Bumgardner Frenzy 98. This gives you a fairly spread out selection to choose from.