I have two pair of the MA2's and I love them. Currently on a CDP and a phono preamp.
I tried the MA3's and MA4's, but had less success. Poor match with my system I guess, but very different sounding from the MA2's.
I also have a pair of JPS SC3's. I've used them on a CDP and on my musical fidelity dac. They are very accurate sounding, but with good tonal color and good bass. They are different than any other of my cables in how relaxed the presentation is.
I would pick the SC3 based on my experience, though the Morrows may have a bit more dynamic snap.