Hi Kuro..; I recently auditioned 5 power cords from The Sanctuary of Sound in Seattle, WA, including a prototype of Shunyata's new "Sidewinder". (Note: right now my system is tilted to the bright side of neutral because of recent installation of dedicated AC system). The Sidewinder is very smooth, detailed, has wide soundstage, and is subjectively fast with good bass, ie pace and rhythm are well served. I think the Sidewinder is tonally neutral, but my system is presently a bit bright so I did not purchase it. Rather, I opted for the Syn. Res. Master coupler which is slightly on the dark, mellow side of neutral-- to help tame my system brightness. The Sidewinder I had was the 20 amp IEC plug version to fit my big McCormack amp. The SR-MC was the more standard 15 amp version, that I put on my pre-amp. I feel sure that if I had not put in the dedicated AC system, I certainly would have purchased the Shunyata Sidewinder, and I predict that at $375. (list) Shunyata is going to sell a LOT of them. But for MY system, I returned the Sidewinder, and ordered a 2nd SR-MC (in 20 amp IEC) for my amp. The SR-MC + Sidewinder was almost an excellent combo. Note: I also have Syn. Res. ICs and speaker cables, so there may have been some synergy with their PCs in my system. The other cords: Electraglide-- little difference from stock OEM; Orchard Bay-- same; Essense ESP-- too much of everything with a forward, aggressive midrange that some may like, but I didn't. I would never buy a power cord without auditioning it-- unless you buy it cheap and can resell it if you don't like it. As Michael Bush (1st post) recommended, I would not overlook the Synergistic Research Master Couplers or maybe their more expensive Reference model.