Hifi Man Sundaras!

I have been researching an upgrade from the Sundara..There are SEVERAL professional reviewers who have listed the Sundara as an "A Tier"headphone in the timbre category & "B Tier"in the Technical categories of staging & imaging,making them a solid "B Tier"headphone & ABSOLUTE stone cold bargain for their meager asking price!!!
ALL my research is pointing to having to spend at least $1000.00+ to get a big upgrade in sound!

Any dongle Dac+HeadphoneAmp that can run this Sundara?

@deep_333  FWIW I was able to drive my HE400S (98dB sensitivity) with an AQ Dragonfly Red.  The Sundaras are 92dB but still may be worth a shot if you can return the Dragonfly just in case.  Not surprisingly sound quality was significantly improved over using the 3.5mm jack from my iPhone/iPad if that’s your benchmark (I use Qobuz as a source BTW).  Incidentally I got a significant bump in performance for not much incremental $$$ by swapping the Apple Camera Adapter for one from LavriCables — very worthwhile upgrade IME.  Hope this helps somewhat. 

@deep_333  FWIW I was able to drive my HE400S (98dB sensitivity) with an AQ Dragonfly Red.  The Sundaras are 92dB but still may be worth a shot if you can return the Dragonfly just in case.  Not surprisingly sound quality was significantly improved over using the 3.5mm jack from my iPhone/iPad if that’s your benchmark (I use Qobuz as a source BTW).  Incidentally I got a significant bump in performance for not much incremental $$$ by swapping the Apple Camera Adapter for one from LavriCables — very worthwhile upgrade IME.  Hope this helps somewhat. 

@soix . Thanks, i have an older dragonfly somewhere...will check it out.

I have closed back Sundaras and LRS. There is something about planars that sets the musicians free.