Beyerdynamic DT 900 PRO X and Amiron Headphones

Hi
My headphones are Sennheiser HD414s that I’ve owned from the '70s, so as I now need to use headphones later in the evenings since moving into a much smaller property, with neighbours now within hearing distance, I’ve done some research and have come up with the following shortlist, based on wanting open-back headphones which are very comfortable and costing no more than £450 max as I will only be using them roughly 20% of my listening time, much preferring my Sonus faber Olympica Nova 2 speakers whenever possible.
I have a Uniti Star and would be interested to hear if you have Beyerdynamic DT 900 PRO X or Amiron headphones, or the Grado SR325X headphones and what you think of them ?
Also, do you think/know if the Uniti Star will happily drive the above three headphones given their nominal impedance of 48 ohms, 250 ohms & 32 ohms ?
Many thanks
Steve