I am sorry about the x-thousand thread about headphones. I was searching for in-ear headphone recommendations for the OP-1 as most threads in this forum are about over-ear headphones. I already have AKG K-240 Studio and Bose QC35 headphones at home but my apartment is located under the roof which means temperatures hit +30°C in summer (or +86 in freedom units) and its not fun to have big headphones on your head. Also for traveling i find in-ears more convenient (except for flights were I take my Bose headphones with me).
I know in-ears are not quite the best option due to the smaller driver but maybe some of you can share their experience. I thought about getting some in-ear monitors like the new Mackie In-Ear monitors series MP-120 (32ohm) / 220 (16 ohm) /240 (32ohm). http://mackie.com/products/mp-series But maybe there are cheaper options.