A mod I have had consistent good luck with is taking a stock unit with a fixed AC cord and asking a reputable tech to put a good IEC socket so I can upgrade the power cord. The good news on this is a) it's a cheap mod and b) you can keep your favorite power cord or trade up. I did this to an old Mod Squad CD player and ended up keeping it much longer than I would have otherwise. I also got a Nakamichi Dragon Tape Deck overhauled by official Nakamichi techs who were willing to put the IEC in, and WOW what a difference!
BTW I use Tara Labs The One AC's, which often cost more than I pay to get the component.
BTW I use Tara Labs The One AC's, which often cost more than I pay to get the component.