I feel like there is a better amp than my Leckerton UHA-6SMKII and curious about keep upgrading. My source is iPod -> CLAS -dB currently for portable use( both IEM/ headphones) Requirements: Battery life at least 14+ hrs, no channel imbalance for IEM when listening at a low vol level, and...

I'm suffering and could not enjoy the music because of the sibilance. They are too obvious in the track. The IEM has to have decent bass but not overpowering, rich mids, and not so sibilant. $600 is my budget. Any good recommendation? 

I have used Westone um3x for a weeks ago... But it didn't give me much feelings. These days, I got excited to Pro copper and Miles Davis Tributes... Does anyone who had owned a pair of one of them? I wanna know how well they are. Thanks    Btw, I'm willing to trade the UM3X for some other...

I'm looking for ATH CK90PRO MK2 at Warehouse123. I have read several reviews about this IEMs which seems to be awesome for me, especially a fan of Audio-Technica xD However, I haven't done any purchase through it, so I am wondering about if this site is legit to u guys. Please help me out~...