I want to start saving up money for a top-tier custom in-ear monitor for use with my Cowon J3. Right now I've got W3s and I'm loving them, but I know my music could sound better, and I want the comfort and isolation of customs. FWIR Impressions: ES5 - Pros: Clarity, build quality, comfort/isolation with heat-activated tips. Worried about: bass JH13 - Pros: Soundstage, bass. Worried about: build quality Straight from a Cowon J3, would the ES5's lack of emphasis on bass be a blessing, or would the JH13's emphasized sub-bass balance out the frequency spectrum better? P.S. I only listen at volume level 1 (the lowest possible) to preserve my hearing. I listen to trance, power metal, soundtracks, indie, and rock.