Need cartridge advice

I have a Koetsu Rosewood cartridge mounted into a Linn LP12 turntable with a Linn Ekos tonearm. The Koetsu is showing it's age and needs to be either replaced or rebuilt. The price for a rebuild from Koetsu is $1700 USD. Do you think I should have it rebuilt, or replaced with something else for about the same money?  Suggestions would be gratefully excepted as I highly value the opinions of this forum 

Sincerely,
Mark