SP10 MK3 recommendation

Albert undoubtedly had a finely tuned setup. I would use whatever he used if possible or if not possible ask him for alternatives along with pluses and minuses of each.

Graham Supreme in whatever length you want. You can also have multiple arm wands with carts already aligned and ready to go. It is also the only arm with a built in bubble level so you can get VTA spot on every record you play on the fly in seconds.

Thanks everyone for insights. They have been helpful....... to some degree! I know the bottom line and ideal circumstance is to have something on hand and see how it sounds in your system. This is especially important when getting closer to the end of system building,which is where I'm at. But sometimes this is not possible, and it is very helpful IMHO to get feedback from several respected sources

I have two MKllls and each is in a double arm plinth. I believe you have room for two arms as well on that Porter Plinth. I use some high end arms and cartridges. The PC-1 Supreme on the 312s is very good. I currently also enjoy the Benz LP-s on Reed 3P. Albert sells a really good imported unipivot you may ask him about. I have a Shelter 90x on that one and even the Ortofon M20 fl super is great on it at $175. No experience with the Atlas unfortunately.

One of the spots I reserved for the EPA 500 system which is somewhat dated and not as fully functional as the others but sounds surprisingly good. It's also affordable and very flexible. I rotate armwands in about 30 seconds. It's a great way to work in less expensive MM cartridges(Ortofon M20 fl super, Empire 4000 D/lll, Shure V15vxmr) or a mono cartridge(XV-1s mono). They all sound great.

Anyway, you should be able to set this up with performance and flexibility that will push the limits of most budgets. Have fun.

@rauliruegas so sony Pua-237 a very underrated tonearm? How good midrange bass and highs can you get with right cartridge?