I know that the stock cable is quite good. I already tried it.
I called my main post office that serves my area and they confirmed that they have the USPS express mail package at their location. I told them that I want to walk to the post office and pick it up in person. They said that it will be ready for pickup by 10:00 AM this morning. It is less than 0.9 miles away from my home. I will call the main post office and confirm that my package is ready to be picked up before I take my walk. I should have it by noon today. My hope is that they were shipped safely and the Cardas cable will work with my Sennheiser HD-650 headphones.
I have a pending transaction for my Moon Audio Blue Dragon cable. I hope to be able to sell it by the end of this week to another Head-Fi member. Quite frankly, I do not want to collect boutique cables for my Sennheiser HD-650 headphones. The Cardas and stock cables are sufficient.