I have heard the same thing about the graham arm on the sme as well
Silly, but don't underestimate the importance of the arm. The 12" V is often praised as the best of the current generation of sme arms. Perhaps a Graham on the 30/2 might be the best package if you want the more compact size. I was going to go for the 20/3 and phantom iii but I switched to the Spiral groove table with the Centroid arm. Both your options are good choices.