The T balls have a strong mid lane read and hard arc to the pocket. The 715T and 505T are great balls!
My Current Arsenal:
715T................... 65x4.4x30 1000AB
505T................... 65x4.5x30 2000AB
Bank Pearl...........60x5x40 1500 polished
Dark Star.............70x3.5x40 1500 polished
Red Backlash.......75x3x35 2000 polished