Well, I just got my headphone lounge cable for my IE-P450's, and I will say it really opened them up. I was considering sending them back for the 6 or 8 driver models, but after using the silver cable, I think I will wait a bit. This is my first CIEM, after going through a handful of different universal IEM's. The quality of the CIEM's is superb. To me, they are a very "fun" sounding IEM, where the mids are quite coherent, the treble sparkles, and the bass lets you know its there without messing with the upper frequency ranges. They aren't quite up to par with my SE846's (especially in terms of bass), but I made a point to remember that when I first started listening to them that they are half the price. Honestly, I almost enjoy listening to them as much as my SE846's, so I think these are a great value for the money that InEarz charges for them. Very reasonably priced, with Kaysen & Kim offering great customer service, turn-around time, and a great product. Though I haven't heard any of them, I would find it hard to believe that a CIEM from JH, Heir, Noble etc., would be worth 2-3 times the price of the InEarz line of IEM's.