I love mine too, using it with the unfamous suede pads. I tried and know that the leather pads a little bit crisper in the upper mid section and has more punch in the midbass section, but the suede is more balanced, more cohesive, more like a HD6xxx line sounding. Plus, i just like much more the breathable texture of the suede in contrast to the warm, sweaty leather. Comfort comes first i could say. So yeah it a very balanced stuff, with one of a kind accessories and build quality in its price bracket or above. (really just show me any headphone under 2K $ where u get this good cable out of the box with versatile hot-swappable connection options and premium carrying case)
I eventually ended up buying the FT5, but also already returned them because the metal headband was more curved in one of the sides, it had some minor scratches, and the pre-installed pads were the leather ones instead of the suede what I also find weird.
Sound quality vs the DT900 pro:
First they are more open, they let more sound in and out, I feel like the DT900 is more like a semi-open then an open HP.
They sounded more detailed and have better quality/resolution, better bass with less distortion when EQd when comparing to DT900, I felt like the DT900 was kinda muffled sounding in comparison (maybe due the thick foam on each driver ?)
Less treble harshness for my ears but good detailed.
Even after saying that I still preferred the DT900 pro x in some tracks.
I also much prefer the FT5 in terms of comfort the ear pressure on the DT900 cause me some discomfort sometimes.
It didn’t wow me but nevertheless, I would say that the FT5 are a step above the DT900 in sound quality but the improvement is not proporcional to increased price.
Take this with a grain of salt, and take also into account that I used the Fiio Q3 to drive this, I read that the FT5 would scale with a better amp/dac (can’t confirm)