Which ps1000 model older, I or E? The PS1000e is very different than the PS500e. The PS500e is the darkest of the Grados (bit rolled off in the highs, brighter than the Elear, darker then the HD800S etc) and the PS1000e is one of the brightest.
The PS500e easily has the most enjoyable tonal balance for me. I can listen to them quiet or loud all day long. Maybe my favorite headphone ever for shear enjoyment. In absolute terms the deep bass, soundstage, and fine details in the highs are lacking but they are my go too headphone these days. I really like the Mids and that is where the music is.
I have only demoed the PS1000e and they seemed to have more details in the highs but are also much brighter. I would demo these first if you are sensitive to bright headphones, and they are super heavy.