All my power cables are made from FP-314AG bulk cable, and FI-11(G) or FI-50(R) output connectors, and FI-AU3112(G) or neutrik input connectors.
Happy with all with Furutech products - in particular the the FP-314AG bulk cable which I think is good value ($50AUD per meter) for a nicely made product. What I particularly like is that it fairly flexible despite its thickness and so facilitates cable dressing. Also it is well shielded, so when I use one those mains power cable detectors no EMF is detected. My only quibble is that the FI-50(R) connector rubber grommet that the cable squeezes through tends to go brittle over time.
Both FI-11(G) and FI-50(R) connectors make for a very solid connection compared to usual IEC connectors - typically the molded connectors on otherwise good aftermarket cables can easily be pulled out with minimum of effort. What is also nice is that you replace the cheap IEC power inlets on your gear with e.g FI-10 (R) for an even better connection.
In terms of impact on sound quality of the system I have not made detailed comparisons, but the one obvious trait is that as I upgraded the power cables, connectors and the power distribution the system sounds warmer and fuller with improved transparency there is an obvious reduction in glare.
I have had great service from the local region Furutech distributor a list of available products and prices (AUD) can be downloaded from: http://www.referenceav.com.au/index.php?option=com_content&view=article&id=67&Itemid=73