Tonearm suggestion for Garrard 301 schedule ll oil bearing?

From an aesthetic standpoint the SME is classic. I do not know the groove master very well but I do not trust Titanium in a tonearm. Unlike aluminum titanium rings like crazy. It is also harder to machine. Maintaining tolerance is more difficult which is why you do not see many of them out there. If you have to have a 12 inch arm then look at the Schroder CB and the Reed 2G. I personally prefer the Schroder but the Reed is also an excellent arm. Both are neutral balance arms with their vertical bearing at the level of the record. Both have frictionless magnetic anti skating. Both are lighter than both the SME and the Groovemaster. This will result in less distortion with most cartridges.

Thanks to all for your response and advices, they are very useful for me. I’ll definitely check Schroder CB and Reed 2G tonearms. Seems like everybody loves SME 3012 series l or 3012R probably  because of the stainless steel arm wand, the problem is that so hard to find lately. 

Your reference to the Denon 103R being a initial Cartridge to be used
and maybe one that will be exchanged for another Model, will have an influence on the Tonearm recommendations being offered.
  
Is there a MC Cartridge you are intending on purchasing after the
Denon 103R  ?

Most likely I’ll stay with Denon or Audio Technica 33EV because my music is Heavy and Classic  Rock. Thank you.

If you’re staying with those cartridges and playing heavy rock, the Jelcos are all you need. I play everything from airy female vocals, jazz, classical, Hawkwind, The The, rap, Blues... No need to blow $5k on a Reed or Schroder etc. 
How is you Garrard set up? Plinth? Refurb level?