Yellow Birch.
Has the spring and resiliency of the White Ash, but is a litle harder, offering more pop and longer life expectancy.
My son loves his Trinity Bats (Fullerton, CA). We were turned onto them by his coaches with the So Cal NTT, and they will custom make bats for the same $$ as off the shelf.
www.trinitybats.comPersonally, he loves the T-VG27 ... the model they make for Vlad Guerrero, and the Adrian Gonzalez model looks pretty sweet too.