Can anyone suggest an alternate cartridge to the Sonata that is more detailed, yet good for classical? It can be a MC with transformer or any other type of cartridge in the $600-$800 range.
In this price range you can look for brand new Garrott cartridges. Something like P77i
Vintage MM/MI cartridges are better, i would strongly recommend Victor X1IIe, Pioneer PC-1000 mkII, Joseph Grado Signature XTZ. For a bit more the Grace F-14 or LEVEL II are giant killers!