Unless you are on the go a ton, I find that high end headphones are such a better bang for your buck than iems. But for the occasional plane flight, a couple hours in a coffee shop reading, etc., the SE535 is enough of a luxury. Honestly, it is more than enough; it is already a huge splurge. But when you start comparing to over ear headphones even in the same price range, like the closed MrSpeakers Mad Dogs or open ears like HD600, I think it shows that you better need the portability because you're getting less sound quality, imo. You're paying $1000 bucks to catch up w/ iems what a $300 open ear can do. Instead of $1000 on a portable in ear, I'd much rather get a closed headphone like Alpha Dog or open like a used HD800...unless you just spend a TON of time needing isolation and portability. IMO.