The Sony 76xx series, and their V600 cousins are nice for editing in vans and shooting on stix, but make a lot of noise rubbing against the camera shooting on the shoulder. I also find the cord way too long.
I use my IFB almost exclusively. The quality of the audio is terrible in comparison, but I find it more convenient by far. However, after shooting with one for most of my career, I do blame it for my subtle loss of hearing on the right side. (or it could be from yammering reporters in the passenger seat!!) I would be very careful about any in-ear headphones.
I had a cheap pair of Koss that were like earbuds, but with a curved attachment that held it on *not inside* my ear. That worked out pretty well. Sound quality was decent, convenient design, and at a reasonable price <$20.