Shure e2c while my Sleek Audio SA6 and W-1 wireless adapter are in the shop getting fixed. Used to use Beyerdynamics DT-770 (so comfortable) but I got tired of full sized headphones and bought some canal phones off head-fi.com buy/sell forum. I'm thinking of selling the sa6 though and getting a pair of ety er4p. The first time I tried those on, my jaw just dropped to the floor.
I don't use any crappy preset eq. If I were to eq, I would use the hardware eq of the sa6. It has bass and treble ports (little rubber adapters that plug into the earphone) that allow you to physically change the signature of the sound. What a shame the iphone doesn't allow manual eq adjustments. That's just retarded.