Mitchell & Johnson MJ2 - Hybrid Design (Electrostatz)

These are down to £120 new on Amazon UK. I just got a pair and been listening all morning so not properly broken in yet. But I already know that at this price they're definitely keepers.

When I first received mine a couple of years ago, they didn't sound all that great. The Lows were a bit muddy and the highs seemed to roll off (IIRC). After running an edited playlist through them at night for a few weeks, I put them on and they sounded like completely different headphoned. I actually like their sound now. Unfortunately, I have so many headphones that I haven't pulled these out in months... now I'm inspired to revisit them due to your post!