Cartridge upgrade

If the tonearm has VTA adjustability feel free to upgrade the cartridge which will be a noticeable sonic upgrade.  

I would cap the budget at ~2K which would include the incredible sounding Lyra Delos, above which there are severely diminishing returns IMHO.  

I have the same turntable and had several cartridges on it, Ortofon 2m Black, Hana MH, Hana ML and now Hana Umami Blue all through Pathos In The Groove phono stage. Do not see any reason to change the table, at least at this point, despite having cartridge much more expensive than the table itself.

I would worry more about the phono stage rather than the TT although arm does matter.

With the Chinook you should be good to go!

I’m biased. The Kiseki Purple Heart NS is one of my favorite carts. I was a dealer for many years. FANTASTIC cartridge!

IMHO, you need a better table and arm.. The Chinook is SWEET, so no problems there.

@OP The Marantz is a effectively an entry level Clearaudio using technology from their earlier decks. Putting a cartridge priced at the level of the Kiseki on it is overkill. As a point of reference, you should have a listen to the new Concept Signature with something like a Hana ML on it and then consider an upgrade path from there. You can always sell on the Marantz to add to your upgrade fund.