I'm sure the Morrow cables are a good product, but I've been a HIGHLY satisfied PNF customer for a long time now, so I guess I should throw my two cents in! Over the years I've tried so many different types of cable, I can hardly remember them all, including all the ones you would normally hear of. When I got to PNF, the journey ended. Not sure what the exact reason for their performance is, very possibly the continuous cast nature of their wire, but I've found that it does what a cable is supposed to do better that any other; it passes a signal correctly from point A to B with the least interference to the integrity of that signal.
The law of diminsihng returns is probably more prevalent in the world of cables than anywhere else. I've found that the PNF products are MORE than a bargain. They're probably grossly underpriced to be perfectly honest, especially in relation to the cables that they compare to in use. The Symphony speaker cables are outstanding and when you couple them with PNF's ic's they are truly a synergistic match that becomes another component in your audio system. Steve Jain at PNF is great to work with and very attentive to whatever your needs are as well. Don't just take my word for it, try them.... most folks who have are glad they did!