Like Bryan I am using the Dynavector 17D mkII - I needed a bigger counter weight as well. I used to use the 20X which was much more lush (to my liking) - but the speed and accuracy of the 17D makes it worth the extra money.
What cartridge are you using with VPI JMW9
Curious as to what cartridges fellow JMW9 users are successful in using. Is your cartridge a match made in heaven or incompatable with the arm?