Ok, I listened to about 20 different headphones today (not all of them foldable), my reference are my Denon AH-D2000, so you know the sound I'm looking for.
The best for me were:
Sony MDR-7506, very comfortable, nice sound, but the treble is a little to much for me, and I miss some bass.
Audio-Technica ATH-M50, really nice sound, nothing I can complain about, but they were too heavy and warm to wear even just after 5 minutes.
Aiaiai TMA-1, unknown brand to...