[Zaarin]

I'm looking for a pair of closed headphones for the office for 5+ hrs of straight use. I do not plan on transporting them anywhere. I do not want my colleagues around me to be able to hear my music while it's in use. I mainly listen to EDM(Trance, House, Techno) without an amp straight into the desktop. My budget is about $200 or so. I considered the HD25-1 II's but I didn't know if there were any other good options. 
 
I currently use Sennheiser IE80's but I've been considering full headphones instead of IEMs due to comfort.

 

[JK1]

Imo an IEM is much more comfortable than full sized headphones that isolate well, as the isolating headphones will probably make your ears overheat after a short time, and/or will be uncomfortable due to high clamping force. Changing the earpads on the headphone to velour ones will increase comfort but decrease isolation.
 
If your IEMs aren't so comfortable then you should get different tips.