i recently bought a h555 and didn't really like it. it didn't fit well with any of the OTE pieces and i had to push it against my ear to really get good volume.
I just got the h680 today and while i haven't messed with it too much yet, the earbud piece is nice because it fits in my ear so I assume volume will be great, however, the OTE piece sucks. It doesn't even rest on my ear. why can't anyone make these things properly?
actually, after messing around with the h680 i am sending it back and keeping the h555. the h680 sucks.