What Tube Preamplifier Under $1800 to Choose?

@buellrider97, yea I'd say you can count your blessings that your wife enjoys this hobby with you. Mine can't stand it and thinks my equipment and media, mostly records, are clutter. As far as the rp1, I should have it soon. It's being paired with my two nad c268's that are bridged, for 300 watts per channel

 For class d. They sound pretty good. I think the tubes in the rp1 should pair well with the class d nads. A similar concept as the rogue sphinx, except much more power on tap. In my main set up, I run a sugden a21se driving my Tannoy eatons. 

I think that the Van Alstine Transcedence 10 RB may be exactly what you are looking for.  Very smooth tube sound.  Quiet as well.  Nice phono preamp if needed (although the option is up to you). Nice headphone amp to boot.  Even with the phono option it will come in well under budget.  Check out the reviews.

If coloration is what you are listening for, a tube preamp makes sense. Colorations/ sound manipulations are part of / in the recordings already. Likely too, the speakers / room. I listen, for the musicianship, and the composition. I think maybe, you just need more OOMPF. Try a ss preamp instead of your passive. Tubes are loved by many, and I understand why. But like everything, compromises are made with each design / execution. I am a solid state guy, and was a "passive" guy, too. Good luck. I wish you the best! Always, MrD.

A pox upon you, sweet deHavilland!

Your siren song beckons me to be dashed upon the rocks of my wife killing me!

I'm gonna throw the Vincent SA-32 into the mix. 

I haven't heard it but if it's anything like (probably better) than my Vincent SV-500 Integrated than it might be something worth looking into.