Get something bass-heavy: Phonak Audeo PFE 012/022 (Same as the 12x series with green bass filters) NUForce 700x/700m ThinkSound TS02 Brainwavz M2 Bowers and Wilkins C5 (Although they have a low rating, they are decent for rap/hip hop) MEE SP51 Out of here, I'd go with either the ThinkSound or PFE. Both amazing bang for the buck IEMs with great bass. If you want more bass, get ThinkSound. If you want more balanced sound (but still be bass heavy), or want an adjustable sound (through filters) get the PFEs. The SP51s are another IEM that I haven't personally tried, but is bass heavy, but tunable.