When you say their newer ribbon cables, I guess you are asking about the PCR and PSR power cables and not the PL cables. I own a PL and it is superb.
I have not heard his sc's, but I also own one of Dave's ic's, a Ultra D2, and it was a game changer.
I doubt there are any cables out there that are going to better Dave's cables at anywhere near the price range he asks.