Common Kalai, is this a loaded question?
You know as well as I do the current draw from the mains is under 100mA for ESL's, the only time a power cord "upgrade" would make any difference maybe is if you had an ML model with inbuilt active woofer amps.
And if your worried about RF shielding the power cord, just get these and clamp them around the power cord you have.
https://www.jaycar.com.au/u25-ferrite-voltage-spike-protectors-noise-suppressors-each/p/LF1290
Cheers George