OP,
Sorry to hear about the accident. Hope you were not injured.
I have had many headphone amps, streamers and DACs… many highly regarded. The headphones performance typically very different depending on the electronic / headphone. I found the difference in headphones accentuated by say, too little current, or high frequency hash, or cold presentation… etc. headphones are in your ear… so any deficiencies in the signal combine with the character of the headphones. I am constant surprised how similar my Sennheiser HD800 and Focal Utopia now sound. I guess my only point is that the whole signal path is important in what you get out.