PS Audio PMG Signature Preamp or BHK Signature Preamp or Bryston BP-19

What am I looking for? The BHK sounds very sweet & with a decent side to side sound stage, but is a little veiled & soft sounding. The minds are a little too thick & congested. Looking for better depth of sound stage, more open & better separation of individual instruments with more detail. I’m not opposed to a touch of sweeting. Would still like to retain a big full & rich sound.  I don’t want tubes.... Tired of chasing the depleted & pricey NOS stuff.  

Sounds like my history @stevehardy1 !  I had Classe, then the BHK then an Audionet Pre1 G3.  These are available now for around 3k and blow away the BHK.  https://www.usaudiomart.com/details/650245373-audionet-pre1-g3-preamplifier-with-remote/?ref=search&q=AUDIONET

I then moved up to the sweet spot in their line, the Pre G2.  I've seen them for less than this, but :

https://www.usaudiomart.com/details/650245373-audionet-pre1-g3-preamplifier-with-remote/?ref=search&q=AUDIONET

Holographic sound with warmth without tubes.

GTT Audio imports Audionet and is a great resource.

I'd really like to hear more from Bryston BP-19 owners for their opinions but it doesn't seem to be many of those units out on the streets. The few reviews I've seen are positive, but I've read some about them being a little thin. Love the 20 year warranty. 

A bit tangential to your question, but I replaced my malfunctioning ML 432 a few years ago with a Bryston 4B, and I don't think I am missing much.  If my current preamp stopped working, the Bryston would be at the top of my list as a replacement.  They sound good, are built to last, and, to my mind, are great value for the money.

Looking for better depth of sound stage, more open & better separation of individual instruments with more detail. I’m not opposed to a touch of sweeting. Would still like to retain a big full & rich sound.

I had a Bryston BP6 for years, and it’s the closest thing to straight wire with gain I’ve ever heard — it’s completely transparent and literally just gets outta the way and sounds like nothing.  In doing so it’s supremely quiet allowing images to unfold in an expansive 3D soundstage with great separation, depth, and tight bass.  If you feed it something warm or cold it’ll come through completely, but if you’re looking to add a touch of sweetness or warmth it will not do that.  I’d think the BP19 would inherent a lot of those traits although reviews may or may not agree with that, but if their trend in amps is any guide if anything it might be a touch on the warmer side but that’s just a guess.  Anyway, not sure if this helps you at all but wanted to share just in case.  You might check out Pass or Ayre as they likely do add a touch of sweetness along with good transparency.  Hope this helps, and best of luck.