http://www.head-fi.org/t/478568/multi-iem-review-269-iems-compared-rha-ma-350-added-01-22-13A very long thread, but the beginning has reviews of MANY different IEMs.
Another man's opinion
http://www.head-fi.org/t/541204/concise-multi-iem-comparison-final-audio-design-adagio-v-added-jan-17th-2013I have a set of RE-262's, TDK BA200, Brainwav B2. All nice, but right now I like the TDK's.
The other IEM that is supposed to be very good, and high bang for the buck are the vsonics.
I wanted to try the GR07 but never did.
The "curse" of IEM's is there are many that sound good, but they also sound different.
Of the three I listed above, the TDK's have the best low end, but they are definitely not "bass head" IEM's.
Almost forgot to mention, I have a set of TF10 and the Sony MH1C's, both of which have more low end than the ones listed above.
Some have a better sound stage, better with vocals, more detail, better high end, etc.
Did I just confuse you more?
Randy