How are the stock cables for these?
3.5mm stock + 2.5mm balanced are similar cables, in thick braid, looking durable, with good banding protection, feel expensive and having a very good build. I would say that I don't have any complaints about it and most of other good IEM models come with pretty similar cables. Didn't hear much of mic effect either but the braid is not very soft.
USB DAC cable is thinner, has some plastic elements (like mic + buttton housing), looks less durable... Still I have the same cable integrated in Sonata HD DAC adapter and using it for about half a year - no problems. It is softer as well.