Perhaps nobody cares, but because the HeadFi community has helped me I would like to share my journey with the community as a big thank you for the great people that contribute and made my journey an enjoyable one.
My accidental stumble onto HeadFi happened last year when I wanted to find a better IEM since i would be listening to music portably the majority of the time. Prior to HeadFi, my experiences with earphones/headphones were Sony MDR-888 (some old earphone that sounded pretty good), Shure SE115, CX300-II, AIAIAI TM1, HD25-II, Bose QC15. At the time the CX300-II which i was using broke, and I bought the ADDIEM mainly because i wanted a remote for iPhone. I actually loved the sound of the ADDIEM because it was very clear but the lack of bass was a problem. My thorough reading of the multi-IEM review threads introduced me to the RE0. Coming from the ADDIEM, the RE0 impressed me not only with its superb detail, but i also found the bass to be very satisfying. I found I could really trust the knowledgeable people at HeadFi and people put so much effort into describing sound signatures and guiding new people to finding the right gear for their tastes, so I lurked around more.
I struggled to find something "better than the re0" to my ears, trying out anything i could get my hands on or at a store. I tried UE700, TF10, XBA3, SE215, BoseIE2, ATH-M50, AD700, Q701. I would have liked to try much more, but i didn’t have the chance. I found I enjoyed the Hifiman house sound - particularly the inoffensive, yet detailed highs. This led me to re-zero and re262. The re262 is a beast, and started my journey into portable amps, E1, E5, E17, and eventually, the c421.
I almost bought the ER4, since im a huge fan of IEMs, but I decided to seek not more detail but bass which i felt would be better with a headphone. So I purchased the HE-400, O2, ODAC. I chose the HE-400 because the IEMs made me listen to less R&B, Hip Hop, Electronic, Rock, and was listening mostly to acoustic, vocals, pop, jazz. I wanted better bass while keeping the Hifiman house sound. I am pretty happy now with the amazing bass on the HE-400, and finally able to listen to the genres i had missed, without compromising the other genres that my IEMs excelled at. I think with the HE-400 I can end my journey.... at least... for a while