Most organic / real / analogue sounding DAC (ideally with Volume Control) for $1500??????

I love my RME ADI-2 DAC. it is about $1,200.00. The best thing about it is it has a fully adjustable equalizer you can adjust to any room. Also has great headphone amp. I have a Schiit Magni headphone amp that I just quit using. The only bad thing is that it has so many variable settings. It took me months to get it dialed in the way I like it. Once you do, it's really good. A good friend of mine has a Chord Hugo 2 and is really thinking about making a change. He brought his Focal Stellia headphones over and was shocked how good they sounded with the ADI. I have Klipsch HP-3's that also sound great.

Aqua La Voce - a bit above your budget, but worth considering. Beautiful analogue sound made in Italy :)

I have been a digital refusenik for decades, fully believing that nothing could ever come close to the experience of listening to vinyl  on a decent system. For me, digital was just a matter of convenience — for background listening on a Sonos system. But when I wanted to really immerse myself in a recording, it had to be vinyl. A few months ago, my analogue world was rocked: I decided to improve my Sonos streaming experience by getting a Wyred4Sound modified Port and a W4S DAC 2v2SE. All I can say is: I was wrong about digital. Yes, playing original vinyl  from the pre-digital era still sounds better than the digital versions, but that has to do with the often-inferior digital masters that are used as source. Most of the time, doing A/B tests there is little or no  difference — as long as I’m streaming CD quality — eg the “new” Neil Young record: if anyone was going to be careful about how his music is distributed, it’s Neil. The album was recorded and mastered in the seventies - so pure analogue. But the digital and vinyl versions are completely indistinguishable on my system. So one possibility, while remaining in your price range would be the lowest priced W4S DAC: the company provides an amazing upgrade path should you wish to spend more at a future date, without having to start with an entirely new DAC.

You could try the jolida or now black ice dac. It has a volume control that is for the headphone Jack however. It is a Tubed dac that has received some great reviews. Alternatively, you could grab the border patrol dac with a Tubed power supply section, also great reviews but lacks a volume control entirely. 

+3 for the Border patrol.  +2 for the Ayre Codex (with volume control).  Both sound very analog which is why I bought them.  A cheaper alternative is the Chord Mojo (very analog sound and volume control).