Which of these power cords ?

@Kingharold It's the same theory as all those high fidelity speakers having the right true sound but they all sound different.

I would suggest the Acrolink 4030. With goods plugs like Oyaide or Furutec
This is an option

However, 

Most important is the LENGTH of the cable. You will need ar least 1.5m (6 feet) . Power cables can act as filters and help reduce high frequency hash. If your system is fed with clean power to start with, everything will benefit. 

My system is wired with Acrolink from junction box to outlet and from outlet to equipment. 

DIY with VH Audio could make your budget.  I like Flavor 4 for my monoblocks.  Good dynamics and value.  You can't beat 'em if custom lengths is a priority. 

Have recently tried a variety of power cords including Luna Orange, Audio Art and Triode Wire labs ( still breaking in).  They all are a step up from stock cords.  The Luna is special; very rich and great timbre; but more costly and very stiff cord.  

Jump on PURIST the best ASAP.