Upgrade Denafrips Terminator 2

Hi Guys,

I started my "DAC Journey" around 3 years ago. Over the time I had an Rasperry Pi 3b with integreated DAC, a Bluesound Node, then a Denafrips Pontus 2 and now a Denafrips Terminator 2. 

I am pretty happy with the T2, but I am looking for the secret Gamechanger in the DAC category.

Sure, the T2 is a great DAC, but there is for todays standard better stuff out there, even for a bit less money I guess.

My next DAC should sound a bit more holographic, more revealing with that warm sound signature. I think the R2R technology is the way to go, but I am open for everything. What I probably love the most about the T2 is that Bass slam. So I am looking forward for that kind of sound.

I read a lot about the very hyped up Holo Audio May. Also other brands like Lampizator, Rockna and LAIV are a names that can not be ignored.

I am a used buyer, so everything up to 5.5k for a used price is okay for me. I just need some suggestions or experiences from you guys.

Maybe someone has an cheaper option as an secret advice from a small company.

Looking forward hearing from you.