Pros: highs are great, light weight, better bass
Cons: feels cheep because of how light, cord is flimsy and small kinda, though at first to KEEP in your ears.
the x11i are great,
it adds some bass but not that much more, but its great with details.
i wish it had better low bass that you can "feel" in stead of just the tone.
(value wise, its a 50/50 because of the low amount of materials used and light it is, i wish there was better built drivers, kinda)
i mainly use my Schiit Audio Valhalla2 and Bifrost Delta Sigma:
i listened to Pink Floyd:TIME, it sounded great and i could hear even more background sounds and detail
i listened to some modern rock: black keys, Hippo Campus, Tame Impala.
they all sounded great with hearing even more details.
the range is better then the s3 and i could tell right away
(i still have to break them in more)
all in all,
i was kinda hesitant to go with klipsch because i heard "some" negative reviews towards the customer service and durability BUT,
i mentioned a personal preference about "magnets" to klipsch and they switched the standard magnetic clamp case with the pouch,
that type of customer service is great! i like to buy from companies that will listen and help their customers,
ill for sure will be buying towers from klipsch as well.(latter)