Is a SUT needed?

Roulegas.  

Since you brought up the Stereophile Shindo measurements, did you see the review on the SKY 40 where Art Dudley preferred the SKY SUT instead of the internal transformers in the Shindo?   Did you see that the Shindo uses Internal Lundahl SUTs instead of an active circuit?   Did you see that the SKY SUT is rated in the A category on Stereophiles top 500 list?

You have said many times that you have tried several SUTs.  Did you try a SKY?

@nandric 
I can assume many things including very positive indeed, but still thinking of extra headache in the chain to bother with nevertheless and regardless of I guess similar to vacuum tubes vs. silicone. 

Dear @bobsdevices : Look, as I posted I'm not against SUTs and certainly not against you very good designs. No, these is not the main subject in my related posts.

No, I had not the opportunity to listen a LOMC cartridge through the SKY SUT but I don't need it because the quality level a the " stay truer to the recording " is not attainable yet through a passive gain devices like the SUT.

In the other side you choosed a really wrong exampel for refering to the SYK performance level because that gentleman AD whom makde the review is some one that is accustomed to a very very low quality performance levels due that " he dies " for that terrible/anacronic electronic alternative name it: tubes. Where is just useless to analize nothing of that gentleman can says in his reviews of nothing.

Bobb, I'm talking of a way way different quality levels and again: I know that your SUTS performs very very good as other SUTs too but even this very good performance levels are not exactly up to the task I'm refering.

Bob, I respect you a lot as I respect any single manufacturer out there. Please don't feel offended or a bad feelling for what I say  in this thread at the end I'm  only a music lover and true audiophile and that's all.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.