well, i wouldnt go that far... I use them on plane trips, travel, when sitting in cafe's, etc...
I still want something that sounds good (im sure there are some around $100 worth my time). I'm not expecting the quality of my UM2's obviously, but I dont like having $200 tied up in IEM's when i primarily use my HD595's.
Considering so far;
er-6i (possibly too bright/weak bass) - $75ish
Atrio M5 (good all around) - $130ish
super.fi 5 EB - $130ish
im716 - $75ish
I like IEM's in such places since they totally block out ALL the noise (especially on flights). I wouldn't be opposed to smaller closed headphones as long as they are light and travel well (in which case, maybe i should throw the ES7 into the loop - but are they comfy?)
whats wrong with um1s? I haven't tried um2s but the bass is decent on them, good for ~100. A little muddy, but I would definitely call them fun headphones. Unless Im crazy, um2s are probably very similar, just more bass, more clarity, more refined.