Kuzma 4 Point Tonearm

As a Kuzma dealer I sold and set up 4Point tonearms and continue to use mine and do setups for others.

In my experience it has never been described as boring. Keep in mind you can adjust the amount of damping oil in the horizontal and vertical damping troughs to suit your cartridge and listening preferences.

I never used the oil but I was using very low compliance cartridges at the time. The OP's Soundsmiths are also low compliance cartridges so I do not think they will need it. 
Check out the Reed 2G, Also a great arm. Similar vertical bearing, magnetic anti skating and arm wands of various effective masses. I did not get it because I do not think it will fit on the SOTA. The Schroder CB 
is such an elegant design. It looks so simple but it is not. There is a lot going on in the central pillar. Like Michael Fremer I have become a fan of shorter arms. Distortion over all is lower because shorter arms have a much lower polar moment of inertia. The lower frequency irregularities of the vinyl are ignored by short arms. But with an oscilloscope you can easily read it with more massive arms even if the cartridge is matched.
I would go with the 4 point 9.  

I have. Almost every Kuzma arm. The 4 point 9 is amazing. For the money it's outrageous. Highly transparent. Very holographic. It has a sense of life that reminds of live music. The fer 313 is very good but not as open.