I like my ML 1.1s with Kubala Sosna Emotion power cords, probably because my whole system is cabled with that cable and I like the presentation of that cabling. Some might think it's a little smooth; my take is that the high frequency hash is gone and makes things sound more natural. If you're looking for more exciting dynamics, a member of our audio club (K-Works is the brand) makes a power cord called the Dynamo (and a less expensive one called the Empowered Cord) that excels in that area, as well as transparency, and is far less expensive than most brands out there in its performance class. I used the Dynamo for a number of years with the Lamms with excellent results (at the time I was using NBS Omega cabling), still keep them around. I'd suggest you listen to the amps with their stock PCs first, though, then see if there's anything you feel is lacking or wrong. Quite frankly, while I do believe power cords make a difference, IMHO the differences are not that earthshaking and not really commensurate with the prices being charged for them.