There are two questions here:
Which cartridges would be a good match for the Thorens, and which are the best match for your phono stage?
The V15VxMR is a great cartridge but if your phono stage is good to average (i.e., the MM input on your preamp or amp, or something in the $100-$300 range) then I'm not sure you'll hear the difference between the V15 and the M97.
If you tell us about the rest of your system, we can probably help you pin down the best values. If money is no object, then by all means go for the V15 or an Ortofon OM40.
Which cartridges would be a good match for the Thorens, and which are the best match for your phono stage?
The V15VxMR is a great cartridge but if your phono stage is good to average (i.e., the MM input on your preamp or amp, or something in the $100-$300 range) then I'm not sure you'll hear the difference between the V15 and the M97.
If you tell us about the rest of your system, we can probably help you pin down the best values. If money is no object, then by all means go for the V15 or an Ortofon OM40.