Rega P6 cartridge upgrade

also needing a spacer, I highly recommend risking a used AT160ML, you get it’s gold plated beryllium tube cantilever and Microline stylus. It tracks at 1.25 gm

https://www.ebay.com/itm/376955688926?mkrid=711-53200-19255-0&campid=5338381866&toolid=10001&customid=7168b744-0753-11f1-8921-303030653534

I got lucky, I risked used: my Sumiko Talisman S; both of my AT160ML’s; and an AT150e body with an AT160ML stylus all play and sound great.

Future: if cantilever good, have VAS put a new Line Contact tip in it.

If I break the cantilever: any current production VMN stylus will fit these vintage bodies, 3 options have boron cantilevers

AT-VMN45xML (microlinear/nude/boron cantilever)
AT-VMN50xSH (Shibata/nude/boron cantilever)
AT-VMN60xSL (special line contact/nude/boron cantilever)

https://www.audio-technica.com/en-eu/support/which-stylus-can-i-use-to-replace-my-discontinued-model

I am happy with my nd5, you could try the Nd7?

 but I now live 6 hours away from NJ

you also live 6 hours from the UK :)

What is your goal for changing the cartridge and what phono stage are you using?

I also have a P6 and my first cart on it was an Exact MM - loved it! Switched to an Ania Pro MC - loved it even more! I was pursuing detail and soundstage over slamming impact (which I also appreciate), so I went for a Dynavector XX-2A. It has been truly enlightening so far. Amazing! Depth and detail for days.

For the record, my phono pre is a Sutherland Little Loco, so I went for the XX-2A since it was reviewed as being a good match for the Little Loco, thanks to its very low internal impedance. So YMMV depending on your phono pre, of course. Also, I'm not using a spacer and the Dyna seems to track just fine. 

I have owned both of the cartridges the OP mentioned. Both are very good low output MC carts.  I slightly preferred the Dynavector but either is good. What phono preamp and/or SUT are you using? I used a PS Audio Stellar, then a Sunvalley, then finally a Hashimoto HM-7 SUT into my integrated amp’s MM phono input.  All were good, but the SUT into MM phono was best.