Never tried IEM that was even close to the sonic experience of a mid-fi open back pair of headphones.
Just my 2 cents.
Portability justifies IEMs, of course. But experiencing limitless sound quality with no compromise is only possible with open back full size hps. IMO.
Again, not wishing to go off topic, but..
I attended the London CanJam last year. I'd always used IEM's and never listened to any high end headphones before, but I'd heard all the hype about the new HifiMan HE1000's at that time.
I tried them on their stall, expecting to be blown away, but was.. completely underwhelmed. I tried a few others that weekend too with similar results.
I can only describe my impression using an analogy: Imagine the difference between going to see a great 3D film at an IMAX/huge screen cinema with an incredible sound system.
Then compare that mentally with watching blu ray on a Hi-Def TV, but only a 28" one and sitting too far away (and with high quality sound system but volume a bit low).
I could clearly perceive the high quality, but there was there was an almost total lack of awe-inspiring immersion and up-close detail like I got with even low/mid-range IEM's (good ones, obviously).
This is in stark contrast to the effects of listening to some of the amazing IEM's there.
Well, this is just an opinion. It seems we're at polar opposite ends of the scale lol.
Personally, I'm baffled by all the people raving about headphones or expressing a preference for them, as you doubtless would be by those doing the same for IEM's.
Mind you, it does lead me to question whether I've missed something? Was it a psychoacoustic effect - lack of 'brain burn-in' for a new kind of audio experience?
Was it the equipment setup or the music files (I listened though Hugo and some huge amps if I recall correctly, so that seems unlikely!)?
Plus the fact that others listening next to me (and in my seat before me) were blown away by the sound..
Well, different folks, different strokes as they say..
Like most people on here, I guess I'm forever on the search for audio perfection, so I don't want to potentially miss out on something that's seemingly integral to so many users' ideal set up.
All advice and comments welcome