Shep, your observations are very similar to mine with regard to the SX. I decided to just give the SX some time to break in before I tried comparing it to the SC. again, particularly since I only use the RCA ICs on my vinyl rig. Upon short critical listening, the detail, clarity and articulation of the SC definitely grabs my attention playing a bit to left-brain nervosa. The SX, however, seems to convey a more relaxed and musical presentation which allows me to turn off the left-brain and simply enjoy the music. The bright and occasionally edgy quality of the SC. is diminished with the SX and I'm much more prone to just sit and enjoy the performance and do so over a longer period of time.