Well the only thing that concerns me about the Custom series is the cord.
My first pair shorted out after a few months, and my second pair is now showing signs of decay. The fabric that surrounds the cord is separating and the wire underneath is exposed on 3 places on the cord.
I must make a request, to Klipsch. Amy? Prof. Thumb?
If there is ever to be a Custom 4, or perhaps a revision of the previous models. Please, please, please include replaceable cords on them! This should be a must for any earphone over $100. $300 is just too much to spend for a replacement set just because the cord wore out on the last one. I would not mind paying an additional $20-25 on an extra cord included in the box or from Klipsch's store. The IEMs are great, but there is little piece of mind about thier lifespan right now so please consider this.
Also can you consider foam and round shaped eartips just for the remainding %40 who have trouble finding the perfect fit with the oval shape.
Thanks