Buff are you talking about image S4s by klipsch?
I found the ck77s in a different league to my S4s. The treble on the S4s was unrealistic and drowned out by the bass. Also with A/B ing i noticed on some very low bass tracks that the s4s simply missed out on sub bass which the ck77 did not. thing is i really loved my s4s as they were such a big improvement on the standard crap you get with most equipment you get these days. i also found them suffering with mid bass bleed. Sound stage on the ck77s is better also. Even with all the limitations of the s4 they were still fun to listen to and at one point they where only £22 which is a bargain.
With all that said i don't think i will ever go back to s4s now. it would be like going back to a green screen CRT monitor from HD LCD one. lol
I also have the Yamaha eph 100 which sound really good, and have 3d sound stage and excellent timbre, but lack bass even though they were described as bass rich (i m bass head that why i got the cks77).