The colour I got it is 'gunmetal'. Metalic and really gorgeous, love it very much. Other colours available is pink, ruby and black; with different level of bass to be adjustED, I got myself a "3", meaning the X3i level of bass which I preferred.

I think there are 4 types of same earphone to choose from judging from this photo which i taken from head-fi forum.

Bijou owner here. 
I cannot do any comparison to other model because this is my first audiophile level earphones. 

First, the vocal of the singer can be hear clearly including the background music such as drum beats and etc etc. 
My Bijou bass level is 3 too, and for me the bass is deep but still not enough for me. I prefer deeper bass  maybe I should take the level 2 one. 
Overall I still love this baby.   

just got my one today...quite satisfy with it..i think after burn in will be even better..

It's stainless steel/aluminium. I can feel the icy cold earphones when u first wear them in an aircon room.

What i meant was my right side earphone mute but the left side is ok. I have to twist the cable under the earpiece and it's back to normal =x.