Tube preamp recommendations for Pass X260.8 monos


Hi all, I just got a new-to-me pair of Pass Labs X260.8 monoblocks. I’m interested in shopping around for a tube preamp to pair with them, and am curious of your general thoughts. I’m not sure of a budget just yet, but I know I’ll want something commensurate in build quality, performance, and yes… beauty. I’m pretty sure I can guess a few of your responses, but I’d love to see if something I haven’t considered shows up. Thanks in advance!

aorigoni

@soix i don’t mind a little bit of tube warmth, but I’d rather it lean more toward neutral than overdone. 

This one is being compared to Preamps 3-4 times it's price.....One reviewer said it "was the best pre he's ever heard...period ".  AUDIO gd Vacuum HE-1 XLR Fully balanced .with 10 Russian military grade tubes. It's made in China and it's a sweetheart...$4K...talk to Wally @ Underwood.

Even though they are both at the upper end of my uncomfortable price range, I’m really curious if anyone has a sense of the difference in sound character between the Audio Research Reference 6se and the Nagra Classic Preamp. To my understanding they both lean towards the more articulate, non tube-like, dare I say clinical side of tubed preamps, but as it’s not practical for me to do a side by side, I’d love to hear input on the differences between them, or even Audio Research vs NAGRA sound signatures generally.