There is not much I can add to the best reviews that have been written here but I must say I am very pleased with the HE-400i... specially when I have been using the Sennheiser's HD600 for so long and was convinced that those were the absolute reference headphones. So naive of me!   The HD600's are indeed good but the Hifiman's present the music with much more finesse and realism. So much that I opened my wallet and matched them with a brand new Burson Audio Soloist SL, which they prefered in detriment to my old Musical Fidelity X-Can V3.   I was...