A lot depends how good or bad your power strip is
,with yours yes a moderate $2-300 power cord will make a improvement
personally you need to spend around $3+ on up to truly get a line conditioner
that truly makes a big noticeable difference .
yes the AC outlet and cables make a difference .
rule of thumb as I have stated many times ,having owned a Audio store
onky 25% goes into the total of any product ,excluding cables , this includes all parts assembly and packaging ,the rest R&D overhead and marketing,markup
if you have a $1k conditioner maybe $200 went into it then packaging , bought in volume thsts why I state $3k on up is realistic if you want Good parts quality
and a sizable improvement . Having been into modding Loudspeaker Xovers the biggest weak spot in most speakers, and electronics , the MFG have to make a decent profit or there is no reason to be in business,
cables can have markup up to 10x the investment in parts ,they can charge any price they choose per hr for their time that's why I look for quality and value with cables , No thanks on $3k power cords for me !!