I currently hook up my PC to an ICON HDP, which act as DAC and amp to drive a pair of Audioengine 2. I also occasionally plug Shure 535 in to listen to music when my wife is asleep (my computer is in the sleeping room) I am thinking of buying a pair of full size can, as I find on ear more comfortable than in ear, and also hopefully, the full can will sound better than my Audioengine 2,which is a rather entry level speaker. I spot a 2nd hand HD800 which sells for $600 and it seems a good deal. However, I heard that the phone is very unforgiving, and it demand good source and good amp to go with it. As I am only using an ICON HDP and listen to music mostly on Spotify, would HD800 be a poor choice? How about Beyerdyanmic T1, Grado GS100e or Ultrasone Edition 8 Romeo,? Which would be more forgiveing toward a 320k MP3 source from Spotify? Any suggestion on other phones which I should consider? I am looking for a used one and my budget is below $800. I mostly listen to pop music like Ed Sheeran, Matt Johnson, Jamie Lawson, and I also like music form Secret Garden, Michael Hoppe. Thank you very much for your help.