Preamp recommendations for my system please

On your list, I like the Ayre.  I have always like the sound of that brand and it has been a part of some of the best sounding systems I have ever heard and I used to have a K5xeMP.
 

Another option would be the PS Audio BHK Signature.  I personally owned this for a stretch and enjoyed it paired with VTL MB-185s.   The stock tubes are horrid but if you roll in NOS Tunsgrams, it is outstanding. 

I ultimately moved away from balanced systems and run single ended gear now but that is more the nature of the brands I import.

i have no relationship with Ayre or PS Audio other than being a happy former owner.
 

@kcpellethead 

Although the Backert is a fantastic sounding pre, and has XLR outputs, it's not truly balanced. So that may not meet your requirement. 

When I've heard Wilsons sound there best it's always been with tube amps and preamps (usually VTL), so of your choices, I'd suggest the Ref 6 (or 5 for cost).

Personally, BAT and VTL would be added to the contenders. Cheers,

Spencer

"Ok New World Man. How do I connect my 2 DACs, tuner, and SACD player to my amp?"

Ditch everything but 1 DAC, signup for Roon and Qobuz. Done. Welcome to 2021. 

Indeed. welcome to 2021. A world where you can become the slave to the renters of most all your music needs for the price they set which is guaranteed to increase until you ditch it like the people who have ditched cable TV which used to cost $10 month. Of course  that will not include all the music which was not digitized. But on the bright side, you won't have any music to pack & move when you xcan no longer afford the rent or when the owner decides to rent to his children or other relatives.

Yep, thats the modern world.

For truly balanced, I think you need to be looking at Atmasphere preamps.