Just wanted to comment and say thanks for the pic, OP.
In all seriousness I used to do headphones as a hobby before I got my BMW. Thousands spent on custom wiring, amps, DACs, etc. And a lot of research into actual sound waves and studio recording.
Anyways I used to shop here a lot:
They have a lot of quality products. Take a look around, see what's in your price range.
And if you really want to go nuts:
I used to shop there a lot too ... they have some true high-end gear.