Dear @mgattmch This is what @bigkidz posted before:
" IMO upgrade the phono stage you get much better results. "
Totally rigth, the phono in the C52 just can´'t do it in the rigth way so you needaway better external phono stage.
About the IV vsV , no matter what the V is superior ( everything the same. ) If an audiophile prefers the IV over the V is only anecdotic and is what the ears of that audiophile and his preferences likes.
Again, you need a better phono stage. before you spend money in other tonearm or other cartridge.
Regards and Enjoy the MUSIC NOT DISTORTIONS,
R.