Back in the vinyl saddle again.

Since my divorce 8 years ago, I have not used my turntable and have been spinning CD's, followed by streaming. As a result, I decided to sell the turntable, along with the roughly 1,000 albums I still had.

To that end I set up the turntable so I could demo it for potential buyers.

Unfortunately, once I played first record, I was hooked again. Now I am mired in another rabbit hole and I am in need of some advice and recommendations.

Current setup is a VPI Scoutmaster (circa 2006) w/JMW 9 arm and a Clearaudio Virtuoso Wood MM cartridge. The cartridge is probably overdue for either replacement or retipping. Related equipment are a Musical Fidelity MX-VYNL phono stage, Musical Fidelity M6si integrated, ATC SCM19 speakers and a REL bass array.

My questions are:

1. Should I keep the VPI or sell it and use the money to buy something newer? If I decide to buy, can you recommend any possible replacement? Budget, perhaps $2,000 CDN ($1,500 USD). 

2. If I keep the VPI, can someone please tell me the real effective mass of the JMW 9 (2006 version) I have? I have read it is anywhere between 7.7 and 10.2. Which doesn't really help.

3. Likewise, if I replace the Virtuoso Wood cartridge, what is a good replacement? Either MM or MC. I am considering a Dynavector XX2 MkII if it is a good match for the JMW9. Also, what do you think about buying used cartridges? Is it an option?

Any help would be greatly appreciated.