Mogami is actually a really good cable, some very knowledgeable people here prefer it to even Cardas 4x24. For me, it depends on application; Cardas is somewhat warmer so it depends on what I'm doing with both.
SPC is generally a little brighter and i like that with most of my headphones (just recabled Sennheiser HDxxx, DT770/80 and made some interconnects with SPC), it has it's uses.
For SR60, personally, I wouldn't bother with the recable, save your money, sell the SR60, buy SR225 (for some reason there are a few on the FS forum lately), they're great! Much better bang/buck than recabled SR60.