Number95, glad you've formulated a plan, which seems sensible and should teach you a lot about whichever cartridges you try.
One caution: Raul's first post correctly mentioned that the Graham might not be the optimal tonearm for lower compliance cartridges. IME that is true and (speaking generally) Koetsu's have the lowest compliance of the cartridges you're considering. They may not perform at their best on a Graham.
I'm not suggesting you change your plan. A stone body's higher mass will help them play better than a wood body. Just be aware that what you hear depends on the arm as well as the cartridge..
Enjoy!
One caution: Raul's first post correctly mentioned that the Graham might not be the optimal tonearm for lower compliance cartridges. IME that is true and (speaking generally) Koetsu's have the lowest compliance of the cartridges you're considering. They may not perform at their best on a Graham.
I'm not suggesting you change your plan. A stone body's higher mass will help them play better than a wood body. Just be aware that what you hear depends on the arm as well as the cartridge..
Enjoy!