My first headphones when I started DJ'ing more seriously were Sony MDR-V500's
Those 55's look exactly like those but more for hipsters with cool red graphikzz and read cable woo.
The 500's sounded f***ing awful but they were better than the 700's for 2 reasons
1. They are lighter
2. They don't snap at the hinges (No auto-swivel)
Would I buy consumer/DJ Sony headphones? Nope
The only one's I'd consider are the pro 7506/V6 or the MDR-CD900ST
Worth noting the 500's were terrible at keeping sound out for a closed back can and couldn't take much volume or have much bass or actually sound any good.