Shunyata Alpha/Delta NR Line.

Surely someone has opinions on the latest line up of Shunyata and the past couple series of power cords? 

Wow thanks everyone for the detailed explanation.  Gbmcleod you've had a lot of experience with Shunyata and it' nice to read about the models and their overall characteristics. I've owned the Python Helix in the past and currently have a Python CX.  The current line of NR cables seem to be much better than the previous models but like you said, it depends on what one needs in the system such as warmth, clarity and detail,  etc...