Have just upgraded from Morrow Audio SP6 to SP7. And once again, the better the cable, the better the sound of my system. Specifically, better resolution and imaging, and perhaps a tad more bass now that they are breaking in somewhat...it's obvious to me that one can get very carried away w/the amount of money invested in I/Cs and SCs; the prices of some exceed the total $ that I've put into my entire system...but the caliber of your components should determine where this "law of diminishing returns" kicks in..I'm not there.
JB52, get help, man!