Tracking ability and relaxed, transparent presentation without noise are things that are important for a cartridge used for classical music, although really those requirements are important for lots of other music too so I am of the opinion that what is good for classical is good for everything.
Two standouts for me are the ZYX Universe and the Transfiguration Orpheus. Of course, to winnow the best out of any cartridge the tone arm is paramount, and the weight of the cartridge and the resulting effective mass of the arm interact: you need a mechnical resonance between 7 and 12 Hz for best result. The Triplanar works exceptionally well with these two cartridges.
