First the sound quality from these are superb, no one would be dissapointed. I also have/had the Klipsch Custom 3, much more expensive and some Seinheiser (dont remember the model) but cost around £150. Actually all very good, would be down to personal preference. My preference is the Klipsch custom 3, then the S4i's. Now the BAD news, within a month the Custom 3's left hand earpiece became intermittant,(and the cable on these is reinforced), swapped for the Senheisers. After a year same problem with the S4i's, until it was obvious the cable was broken inside. Checking the internet for repairs it is a COMMON problem, and don't expect any help from Klipsch because they know, and broken cables will NOT be repaired. Very frustrating because the SOUND quality IS SUPERB !! for such expensive phones it is an obvious design weakness which has to be addressed. I also own a Klipsch ipod dock, again for the money fantastic sound, even compared to the Bose, and built to LAST !! I would love to buy Klipsch again, but in all honesty I know the same problem will arise. Too expensive to last around a year. I am 63, so not some teenager using them for hours every day. I use only when travelling by train or plane. At home I have some Senheiser (H525 ?) closed headphones. Looking at other reviews for all the Klipsch range even the most expensive model, all have the same problem, the cable breaking far far too often within months of just light use. Surely reinforcing the cable join can't be a big deal to improve what is acoustically a great headphone.