gauge and insulation. thats the only area of advantage that can be gained in different power cables. there is no signal being transmitted so all that matters is having the proper gauge for the amount of power being drawn through the cable and proper insulation to avoid stray signal from adding noise to the cable, and since proper insulation is required by UL listings dependent on wire gauge this should never be a problem. If you need to run a longer power cable then stepping up a gauge may be required depending on the power draw of the equipment so as to not overheat the cable from trying to pass too much current through it.
From there its asthetics and feel. Some cables are more flexible than others of equal gauge which can help depending on your equipment location and some have a more "industrial" feel to them giving a sense of better build quality.
power conditioning doesn't change things, again, its theoreticaly a constant voltage and constant single frequency with varying current. No timing issues, etc as with signal cables, no digital information to loose to noise, etc. So a well constructed poper gauge and insulation cable will do fine, no need for anything fancy.
Denon AVR-S700W, Energy Take 2 f/r + Center (Original's, pre-"Classic" Model)
Marantz UD5007, Tivo Roamio, Amazon FireTV Stick, Asustor AS5004T
Belkin PureAV PF-60