I got my Superlux HD681 a month back and they sound really good. I can't explain how CRISP and DETAILED the sound is on these things. I can hear every little thing. + the Xonar DG. I almost cried when I first heard them. Buuut. They have a bit of boring sound and are really uncomfortable sometimes (depends on weather really)
TL;DR: I need a pair of headphones with nearly identical sound clarity/detail to the 681's but with a more fun sound and improved comfort.
Here are a few headphones I've been thinking of.
Panasonic HTF-600 (but I've heard the sound is very 'slow', what does this mean?)
I'm thinking of one of the Sonys because of the comfortable.