DAC recommendation for DSD input

I agree with @pwoodard922  a used Lampizator is what you are asking for:

"My hope is for more resolution, more musicality, less high frequency fatigue, tighter bass."

If you can find a DHT model like the Big7 or Goldengate it ticks all your boxes.  

My DAC path was first a Schitt Yggdrasil to a W4S DAC2 DSD SE to a Denafrips Terminator to a TerminatorPlus (with IRIS) to a Lampizator Goldengate which I sent back to Poland for the Engine11P upgrade which was a huge leap of faith because I did not think the DAC could be improved but I was very wrong.  Its been over a year and I can't imagine ever moving on from the Lampizator.  

I was pretty happy (I thought) with the TerminatorPlus and bought the Goldengate on a bit of a whim (that's Freudian for a subconscious doubt of my happiness) and I'm glad I listened to my doubts.

I'll write it again, it ticks all the boxes you are looking for and more.  

@mintakax I have a HEGEL H160 in a second system and when I added an inexpensive Schiit Audio Bitfrost DAC, it made a clear improvement.  It was very impressive.  I’m not suggesting you buy a Bitfrost DAC, I’m just answering your question, would an external DAC make an improvement in your system? It did in my system.  I have an integrated amp in my main system and I bought a used MSB Discrete DAC with (2) power supplies for $7.5k. You did mention this particular MSB DAC and questioned the price.  I understand that and that’s why I bought it used and it made a big improvement over the Holo Audio Spring 3 KTE DAC that I had, which was very nice as well.

It would be nice if you had a dealer loan you a DAC to demo at home.  In my experience, the components I’ve demoed at home sounded better than they did at the dealer.

It’s a fun journey in this hifi game!

@mintakax The advice you have received is all excellent. I was in a similar position and looked at several of the ones recommended here. I found the Tambaqui less 'musical' than I wanted, but it was nearly my choice. The T+A 200 was another almost choice. It was not as detailed as I desired. I did not try to the PS Audio because I had the Mk. 1 and I did not like how the software upgrades changed the DAC profile. The Chord Dave with the M-Scaler was way too bright. I wanted to try the Weiss 501, but could not find one I could test in my system, other than from The Music Room and I had just returned another item. I really did not want to try it and return it.

I ended up with the Bricasti M1S2 which I did buy from the Music Room. I tried the earlier model in my system (M1SE from a friend) and loved it. The M1S2 was even better. What I especially like about it are the filter options. One option sounds just like the Chord Dave and another like the Tambaqui. I find I do change the filter depending the choice of music. It is like having multiple high end DACs all in one unit.

The Streamer option is a big choice. I went with Innuos, but may be looking elsewhere down the road.

Try the Bricasti M21 DAC. It has multiple paths for conversion to analog including 1-bit DSD. Here is a link to the literature 

I have the Mola Mola Tambaqi as part of a Makua and when I use Roon, I convert all files to either DSD 64 or 128.  The MM particularly loves DSD files.  @fastfreight has done a lot of work on this so I would give his thoughts extra weight.  But I would say that it is critical for you to get a different streamer.  I have a Nucleus + with external LPS power supply and also an Innuos Zenith SE.  I find the Innuos both in “Sense” mode and in “Roon” mode to be superior to the Nucleus.  I also have an M12 gold switch. I have a friend who has an Innuos Phoenix Net and another that has the Nordost QNet.  All do a good job.  My advice to you is get the Tambaqi but also know that you will need to get the Mac out of the system.  In the past, I have used iMac mini, Aurender, Nucleus and 2 different Innuos (Zen mini w. LPS and the SE).  I am a big believer in the Innuos line although I have not had the chance to put a Grimm in the system, I suspect that combination is outside of your budget.  Good luck!