SUT help

I have not watched the Youytube Clip, the Title itself 'Best Sound' is a detractor immediately. I have run out of Steam, when it comes to being exposed to such individualist assessments. 

A Phon' used as a MC Input only or MM Input connected to a SUT or Head Amp, is a matter of choice to experience and a matter of choice if it is to be maintained.

The choices made are not ubiquitous and the Math for the choices that can be made will take one to one option type if the quietest of output is the desired goal.

I have as of yet, in relation to listening experiences, not been convinced that a MC Input on an Phon' is the option to be maintained by myself, over other options. 

I watched the video. The SPU 1 cartridge puts out 0.18mV, by a very liberal criterion of 5mV/cm stylus velocity. The JC3+ affords 64db total gain on MC. Could be that the amplified output of the JC3+ is not quite enough to get the most out of the downstream sound system. (The signal voltage output would be about 0.27V, not by itself enough to get the most out of most amplifiers.) Could be the JC3+ has an inherent lean sound on MC settings. Could be his ears. Anyway, for sure a SUT is an option.

Thanks for weighing in @pindac and @lewm. What intrigued me about the video was the discussion about SUTs providing different flavors which could be interchanged either by swapping the transformers (in the one case) or changing the loading and impedance in the case of the Andros Allasso. I was intrigued by Guttenberg's suggestions for accommodating different carts and, in the case of the Allasso, making on-the-fly adjustments. What are your thoughts on these two different SUT applications?  

@vacountryboy Since he didn't go into detail at all regarding winding ratios, I wonder if the different 'flavors' he could be referring to may simply just be a difference in gain between the different models - though the perceived difference between the two Audio Note models is interesting as they have the same ratios I believe.

Ultimately what I've gathered from this thread is just that there's no definitive answer here and ends up coming down to individual preference based on how things sound in your home and system. I'm going to try to poke some friends of mine to see if they have any models I could demo in my system just to play around with different things before I make any buying decision.

In my first post on this Thread I make known my perceptions of experiencing broad variety of different SUT's from Brands and Tranx Suppliers. I also add my perceptions of Head Amp's experienced as well.

Various Perceptions of Tonal Richness can easily be described variety of flavours or seasoning.

What I did not make known is that I can create a perception of immense Tonal Richness by using the MM Input on my Valve Input / Output Phon'. It is not in anyway preferred, but is as Tonal Rich as I would ever go near as an experience to be had.

I have experienced SUT's that can create a perception of TR that has surpassed the direct into the MM Input I can endure for short periods.

SUT's need to be experienced, to discover where ones TR tolerances are to be pressed on or where there is a TR that can be embraced and wanted to be maintained.