No one can tell you which flavor you will like in your system, there are so many cartridges on the market and they are different. People who enjoyed ART-9 on this forum, and raved about for a long time, sold them and bought something else, just like with many cartridges. Do not expect a universal answer. Vintage LOMC cartridges are much cheaper even with the most exotic cantilevers just like Dynavector KARAT diamond series that you can probably find NOS (never used) under $1k (i paid less than $500 for one of them NOS and it was amazing deal on ebay).
A lot of people on here buying NEW grey market products without warranty, they don't care just because the price is $200 lower. The more important is not OLD or NEW, but who is the seller or dealer and how they can support a buyer when there is something wrong (in the worst scenario). If you or your cleaning lady will destroy a cartridge it doesn't matter was it New or Vintage, they will be destroyed anyway.
If you're looking for a sound quality then it's up to you which cartridge is better, there are many vintage cartridges that can be 3 times cheaper and 2 times better than anything new.
A lot of people on here buying NEW grey market products without warranty, they don't care just because the price is $200 lower. The more important is not OLD or NEW, but who is the seller or dealer and how they can support a buyer when there is something wrong (in the worst scenario). If you or your cleaning lady will destroy a cartridge it doesn't matter was it New or Vintage, they will be destroyed anyway.
If you're looking for a sound quality then it's up to you which cartridge is better, there are many vintage cartridges that can be 3 times cheaper and 2 times better than anything new.