Shure SE115

they wont lack bass, your just used to overwhelmingly huge amounts of it.

eat a mars bar then take a swig of coke, same thing.  give it time your ears will cleanse themselves

I have the SE115 and I say you will have to burn them in. Took me 2weeks (not sure how many hours) now it sounds good. BTW I listen to mostly jazz. The bass is there but the sub frequencies is not that prominent. The mids are the strong point for this IEM.

Just my 2cents

They're dynamic drivers, for which the benefits of burning in are debatable.  I had those exact IEMs a couple of years ago as my first set of good IEMs, and I enjoyed them, though the bass was a little weak for my taste, too.  Though I feel like the bass in my current S4s is better, more present, I liked the SE115s better overall.

I have to agree with mark...the bass in Bose 'phones is typically exaggerated.  Give your ears a few days to burn in and the IEMs 50 hours or so, then see if they fit your listening style better.  You should start to pick up on more subtle differences in bass frequencies than you did with the Bose--that's something I felt like the 115s did pretty well.  If you still don't like'em...send'em back and try again!  :D