recommendation for a high end analog system

I did have Andy Kim retip it with sapphire cantilever. My Kitsune MK5 phono stage does not have an SUT. When I crank up the volume with no music, there is some audible noise. I don't hear it when I stream music. So, may be I need an SUT like CineMag ahead of my phono stage as Jasonbourne suggested.

@chungjh

I looked at the info on your phono pre, and it seems to be designed for both low and high output carts. Thus, you should not need a SUT. Perhaps I am looking at the wrong model, but there only seems to be one MK5.

Typically a SUT is most often used when you use a phono pre designed primarily for high output carts with a low output cartridge. Or, you buy a high output MC cart (when offered) to use on a primarily MM pre.

As another Sota owner I think bkeske has the right idea. Your arm is a little on the heavy side. Something a little lighter would be nice along with a better cartridge. Rauliruegas is right there. As a Sound Labs owner you will appreciate a cartridge with more detail, the Lyras, Ortofon Windfeld Ti, Soundsmith Sussurro  or Voice. As for tonearms, you are limited to 9" arms that will fit that include my favorite The Schroder CB but also the Reed 2G, the Kuma 4 Point 9, The SME IV or V, Origin Live arms and others. The current Tri-Planar arms will not fit without significant modification to the plinth. The Schroder will fit like a glove and is hard to beat at any price. If you call Sota with your turntable's serial number they will send you a new arm board. After that deal with the Phono stage if the sound needs more improvement. 

@mijostyn

That Sumiko is a rebadged Jelco. I do not know enough which Jelco it is. If the 750, it has an effective mass of 13.5. I believe the 550 is only 9.5. Models ‘below’ the 550?

Neither should be too heavy for the 103. In fact, per the calcs I am looking at, either *should* work.

All that said, I think to get better sound, a higher end & better performing cartridge would be my suggestion. And as a Soundsmith owner and fan, of course, that is what I would recommend. But, something like a Hana ML would also be a good choice for a decent price, and I would think, far better than the 103.

Are you chasing the Quads or the Lyra / Triplaner ?

and yes, I have a Lyra, Triplaner and Quads...and a SOTA/FT3/Hana ML. I put them somewhere....

How old are the Soundlab ?