The battery on my current Rockboxed Sandisk clip plus is dying, so I'm looking to upgrade. Currently, after adjusting the bass, trebel, and eq on my clip+, the sounds coming out of the Shure 425 sounds perfect to me without needing an amp.  With other pmps, either sound clarity or bass is...

Hi, my current set of shure 215 is starting to have cable problems so I'm looking to upgrade. I've narrowed it down to a few choices available from the local shops, with the shure 425 as my first choice.  The 215 is the most comfortable iem I've worn so I'm drawn to that design. Audio source...