My main gear currently are an Ifi Zen DAC and some nice Hifiman 4xx plugged into them.
No matter what, I keep coming back to these two. I have other gear, not this is the one that pleases me the most. It is not my endgoal, but it’s superb to my ears.
LCD-4 with Qudelix 5K or Singxer SA-1 when I stationary.
Got HD-800S recently and running them with 5K, however, still like LCD-4 better.
LCD-4 have a great balance between resolution and soundstage (HD-800S is more focused on soundstage/imaging). And a different tuning. So definitely reasons to prefer it.