Help selecting a power cord.


All my gear has the factory supplied power cords  I’m ready to try 1 aftermarket power cable as a test.  So what brand power cable should it be and what device gets it first?  Tube pre?  Tube main?  D/A?  CD transport?  Roon Nucleus?  Subs?  GE Trefs?? Turntable? Oppo 103?   Which piece of my gear should be most affected by the improved power cord??  I look forward to the responses and will likely choose the cord that has the most recommendations.
128x128fastninja12
Get a good power cord and put it on your power amp or integrated amplifier first.

Note, get a good power cord - spend about 5 to 10 times what you initially thought of spending on the cord. I have had better results from upgrading my PC than I have had from speaker cables or interconnects. 
@lalitk I chose Pangea based on a recommendation from a friend. They are very good cords for the money.  Power cords don't make much difference in my system because of the components.