Looking for a preamp with XLR connections

Balanced Audio Technology - BAT preamps are truly balanced and very good. Made in the USA. I have a BAT VK-42se which I got used and it is primo. 

If you totally satisfied with your source signal quality, passive preamp could give you amazing results. Something like Bespoke Audio Company Reference. 

I had a Schitt Freya and I thought it was noisy in the sense of distortion. I have since moved on and up to Allnic.  I started with the L-3000 then moved up to a L-7000 with constant impedance attenuator and recently sold that for a L-8000 and have no reason to want more.

Allnic Pre-amps are uber quiet and often described as holographic.  They have excellent low end resolution and presence.  My L-8000 has gobs of timber and detail in the low end.  I have 2 REL subs in my system.  Their accuracy detail and speed lean much more towards SS than tube sound but they are so relaxed sounding.  I think the best of both worlds.

FWIW, check the input sensitivity of your amp before buying a pre.  Make sure they are not both high gain.  I had an issue with the Allnic and my Pass amps.  I was able to use 2 sets of low gain output tubes to remedy this.

That BAT VK-42se was a fav or mine. It is very warm, but at the time I had it, I need a very warm preamp. A SS fully balanced preamp.

I have 4 preamps a MicroZOTL MZ2, Cary SLP 98, Coincident Statement Line Stage Mk1, and a Supratek Sauvignon. The Latter 2 have XLR connections. If you've never heard of Supratek, you should look into them. The Coincident is very good but, uses the 101D tube which has more limited choices and can be expensive. The Supratek is based on the 6sn7 tube which has more choices. There is a Supratek thread on here called "Preamp Deal of the Century" with 78 pages. It is full of praise for the Australian Supratek models. My Supratek is broken (my fault) and is need of me getting off my ass and sent out for repair. I am currently using the Cary SLP-98 but if you could afford it, the Cary SLP-05 would be a "last preamp you'd ever need" purchase. Between the Coincident and Supratek; if you need tone and texture get the Supratek, if you're bag is transparency I'd find a used Coincident Statement. Both units have separate power supplies and are built like a tank. (M1 Abrams of course)