Tonearm mount to the plinth vs arm board vs rotating arm board vs isolated tower

Hello,

I am rebuilding a Garrard 301 and looking for a plinth. I am planning to buy 3-4 tonearms to try. I would like to know which is the best way moving forward.

Is there a difference between mounting a tonearm directly on a solid plinth vs arm board (same vs different materials) vs rotating arm board vs isolated tower. 

Thanks
Nanda