SME and OL tonearms....

Just make sure all adjustments are available on your new arm.  Some arms are limited

SME have a knife-edge bearings, it is not good for many cartridges.
Look for Reed tonearms or Kuzma if you’re looking for something really great and new.
Reed 3p is my favorite modern tonearm (available in 9 inch, 10.5 or 12 inch) 

I can highly recommend moving on up the Origin Live line. Their Conqueror has served me well for over 10 years now. If I were ever to upgrade it would be to another Origin Live, without hesitation. No idea how they compare to SME, mine was an upgrade from a Graham 2.0, an arm which in spite of being very highly respected is nowhere near being in the same realm as my Conqueror. In the more than 10 years of using mine I've massively upgraded the cartridge, phono stage, interconnect, and turntable, never yet felt any need to upgrade that arm though. They've improved a lot, now with better wire, arm tube, etc. Probably priced out of your range, even used. But whatever. You get the idea. Just get the best OL you can afford, relax, and enjoy.

Dear @teleos : I like OL but I like SME too and the SME models you listed  has removable headshell that's an advantage to interchange in easy way diferent cartridges.

Btw, no one of those SME has knife bearings but ball races.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.