I used a 20 amp Custom Power Cord Co. Model 11 on my power conditioner and was suitably impressed. This cord is also reasonably priced within the realm of high-end power cords as well.
Best 20A IEC power cord
It's been a while since this topic was covered in Audiogon. I have the Sierra Denali amps and the power cords are pretty loose fitting. That aside (I'm sure they would be replaced if I asked), I have a bit of an aversion for stock cords. BMI no longer makes the 20A version. Any other recommendations? Thanks in advance.