Saoshyant
Headphoneus Supremus
Edition S is next on my hit list. I listened to them at Axpona and was extremely impressed.....I wouldn't say they were better than my Sines because I didn't compare them long enough, but they were damn close, and the option to change them to open cans while also being half the price make it a no brainer for me
One Head-fier mentioned that they felt there was no real audible difference between open/closed for the Hifiman Ed S, but I might be misremembering, and I also don't remember if that was a prototype or final version. If it turns out it really can be a closed/open convertible portable can, just for the novelty of it I'd like to pick it up. Then again, I know the Sine is reviewing quite well, which leads me to believe if I run across one on the used forums, my ability to resist buying probably won't hold up.