The x11`s are very convenient as they are impossibly small, light, and isolate well, despite this, they have a warmer and bassier sound sig that definitely doesn`t suit their diminutive size. They aren`t at all much different from the x10`s so it may not be worth paying $200 for a better cable since klipsch has great customer support and warranty anyway. Apart from this, the sound quality is nothing particularly exemplary, everything is good but not great, details are there but they tend to be more laid back than revealing, bass is nice and smooth but doesn`t extend to the deepest of deeps and mids follow suite with a smooth, laid back presentation that feels neither intimate nor distant, treble is where my gripes begin, they are rolled of to a degree and aren`t at all sparkly or extended, soundstage is pretty poor in general and separation and imaging are not that great, they are an absolute steal at $120 but at 300-400, their only redeeming features are their convenience as sound is probably inline with more $200 earphones. Ie800`s are much nicer in terms of sound but their awkward fit and lack of isolation will be crippling, it may be best to pick up two pairs of earphones, one for travel with good isolation and portability such as the klipsch and one for home with some really nice sq but a more eccentric, less ergonomic form factor.