IMO the most accurate is able to deal with changing groove modulations and gradually increase force as it nears the inner grooves. This is basic physics; based on pivot arm design. Any out there that do this ?
There are at least two that I know of Chris. The Continuum Cobra and Copperhead arms.
By using a triangular shaped anti-skate 'cam' on the underside of the arm, the anti-skate force changes from 8% of VTF at the start of the record to 12% of VTF at the end of the record.
Cheers