Hello @patrickalston and hello @soix !
I guess a good thing I am just seeing this as it is as usual contentious. I would say to you OP that @soix is as usual giving good advice. I have owned many streamers which I will list, and have used them with different DACs, and can easily say that a good streamer takes a great DAC to another level. I was once told my Tambaqui was a Lamborghini and I was feeding it regular gas...
My streamer history:
Macbook
Dedicated Mac Mini
Bluesound Node
Auralic Aries G2
XACT S1 (extended demo)
Grimm MU1 (still own)
Auralic Aries G2.2
Pink Faun Scion (recent purchase and still own).
Without a doubt, on my systems and to my ears, each and every upgrade made a significant difference. And note, my Scion was my last purchase to an already optimized system. And it took it to another level.
My Tambaqui likes the AES input of my Grimm MU1, and my Master Fidelity Nadacs (like your BAT) want a USB input. Regardless, the better the streamer the better the sound. But don't get a Grimm if you want USB!
I am not saying anyone should spend 20k on a streamer. But I am saying at a certain level it makes sense and is worth it (to me).
Anyone who flatly denies it makes a difference is IMHO wrong, likely has not heard a great streamer comparably in a great system, or can't hear the difference.
Congrats on the great system you have built...and don't be afraid to get a non tubed streamer since you should have plenty of tube warmth already!

