I note that the SME arms are around 700g vs the Kuzma 4point9 at 920g.
Have you considered getting a Kuzma front end - Kuzma R with 4point9 is less than the SME 15/V. In fact for around the same money as the complete SME 15/V you can get a Kuzma R with the 4Point11.
I have compared the SME 20 and Kuzma TT - they are similar in performance, but for me the Kuzma 4Point is a step up from the SME V - more transparency and speed whilst very neutral in balance.