I'm the OP here. Budget would be around $1500 hopefully, new or used.
(But if something is really special, I could save up for a while or sell something to do it.)
About 10 years ago, after trying a number of cords, I found the old Shunyata Anaconda VX to be best and have stayed with it. Each time I tried others over the years. (Purist, Telwire, Stealth Digital, Kimber PK-10, TG audio, and some others), the VX won out. A close second is the Shunyata Anaconda Alpha.
I have an EMM XDS1/V2 (upgraded from the V1).
I find the power cord has a very large impact on digital sound, especially EMM gear I have had over the past decade, which is very revealing, for better or worse.
I have not tried much recently so I just thought some people would have experience with newer power cords for digital sources.
Thanks to everyone for the advice and comments.