[rollbread]

Can someone help recommend me an IEM maybe around $100 or lesser.
 
 
 

 

[nfinite]

For clarity you can try Hifiman RE0 ($79) or RE-ZERO ($99)... if you can, try them both before you buy it...
both can be plugged directly to iphone, you don't need amplifier to drive them...
 
the Review:
RE0: http://www.inearmatters.net/2009/06/sonic-diamond-hifiman-re0.html
RE- ZERO: http://www.inearmatters.net/2010/09/review-hifiman-re-zero-time-to.html or http://www.head-fi.org/forum/thread/500352/hifiman-re-zero-review

 

[ZARIM]

RE0(very detailed with extended highs), HF5(highely recommended because very detailed, offers extended highs, block out more noise and good vocals), HF3, EX510(wide open soundstage, detailed and deep, punchy bass), EX310, EX600(little over your budget but highely recommended because very balanced, highely detailed).