Hi AdamP88,
Yep, I agree the Koss Plug is bass-heavy, but better too much bass than NO BASS at all--and that's what I get from the Etymotic ER-6i, which makes the siblilant midrange even more annoying. And it doesn't matter how far I jam them into my ears, the bass is still anemic.
I also agree the ER-6i provides greater isolation than the Plug.
A much better and more comfortable, albeit expensive, earbud is the Shure E4c: excellent bass, smooth midrange and nice detailed high end. But it's $300. Then again, so is the other Etymotic model which I haven't tried recently. I assumed that if the $139 ER-6i has a lousy fit to my ear canals, then the costly model won't be any better. Other friends of mine like the expensive Etymotic.
Sonicfox: the first version of the Plug was disappointing and didn't fit my ears. The newer version is much better. Every Sony earbud I've heard is seriously misbalanced, but I certainly have not heard every model so perhaps Sony got one right.
Regards,
