PC's for tubes?

Hi everyone.

Any recommendations on power cords that mate well with tube equipment? I have a Music Reference RM5MkIII(modded with IEC input) and an Aronov amp. I like the VD Nite and new Power1 w/SOL. Incredible bass and spatial qualities. A little laid-back in my system though. Have tried AC Master Coupler-classic and Discovery so far. (Cannot compete with VDs at all) I have read in 'BFS' that ribbon-based power cords work well with tube stuff in general. However, most PCs are not ribbon-based, therefore, a very limited selection. Also, I've read that ribbon-conductor PCs have inherent limitations. So, yes or no to ribbons?

Thanks in advance for any ideas or opinions.