Need Tube Preamp Warmth


I’m looking for recommendations for a tube preamp with a warm presentation, good soundstaging and imaging, and low-end extension.
It will replace my Rogue Perseus Magnum, which is a detailed, neutral sounding preamp with a great amount of extension in the highs. Even using Mullard Longplates, I’m not getting the sound I want.

The preamp is paired with a Sunfire 300 which has an input impedance of 42 kOhms and input sensitivity of 1.64V. (Single-ended).

The rest of my system is comprised of:
ARC CD3 mk II
Linn Axis TT
Gallo CL-3 speakers
Purist Audio Aqueous speaker cables
Cardas Parsec ICs
Audience PowerChords

The ideal preamp will reproduce classical music in an organic and natural way. (Not looking for vintage).
My budget is $2000 to $2500 used. Any help is much appreciated.
128x128lowrider57
We have a dealer in NYC but he does not have the UV-1 in stock. Not many dealers do at this point- Essential Sound in Chicagoland is likely the closest right now.
Atmasphere, thanks for correcting my mistake.
I spoke to USA TUBE AUDIO and they're out of stock, but expecting more UV-1's to arrive.
Sorry about the confusion I caused earlier...I should have said "Ultraviolet" to be more clear.

I haven't heard the Dehavilland UV, but I heard a CJ pre not that long ago (I don't recall the model but it was a little pricey), and I thought it was especially 'dark' sounding...but whatever works....

Ralph's pre could be perceived as 'warm' but is somehow very transparent to the source without scouring your ears out with the details. Not sure how he does that. Sounds very nice with Hitachi 6SN7's....
Thanks, Larkston...I'm the one who was confused; UV, UV-1.
I've only found one online review and it was a rave; a preamp with a natural and realistic sound.

I like Ralph's straightforward designs, and with this little preamp, I wonder how deep and full the bass is; in a normal device you would need a decent sized power supply.
I sent Ralph a PM for specifics.