AKG K99 Headphones
*note the one I have are the new perceptions not the old ones, not sure if there's a difference other than a logo change* These cans are pretty under the radar, but if you can get them for a cheap price (I paid 50 bucks CAD for these) and you have an amp or a good dac, then they may surprise you.
Very light and insubstantial; Neutral, textured exiciting sound; Loud without amp; Good detail, soundstage and imaging for the price; Minimal design
tonality is a bit off; leakage; needs amp/good dac to get good sound; ear cups hard and uncomfortable