Help ! Best MC cartridge for Linn LP12?

Were I in the OP's situation, I would go Kandid and call it a very good day. Sure, Linn is not the bleeding edge best, but it's quite good. Kandid and Ekos SE is frankly a no brainer in teems of a match. 

I do note I have owned my LP12 since 1998 and really like it. Presently fitted with an Ekos Mk 2, Arkiv B, Lingo, Trampolin, Silver T cable and Kore subchassis. Were I to start from scratch, there are some excellent tables available these days. I was mighty impressed by the VPI Prime, and I think SME makes a great table and arm. I'm invested in Linn, my LP12 has been ultra reliable, and I enjoy the music I get out of it, so what the heck. I'm not particularly into changing gear- if I like it, I tend to keeps it for years. 

If I were starting in vinyl from scratch and I had a $15,000 -$20,000 budget for vinyl playback gear I would seriously consider an SME 20 with a Series V arm. It's a little different with many of us LP 12 guys. I strongly suspect we wound up with $10,000 or more dollar in playback setup incrementally. 

I guess I am lucky. My LP12 is tremendously musical. My digital side, with a Bricasti M1 at its core, is also extremely musical. Perhaps this is why I've not changed gear in years.