The toxic cable was on my short list until I stumbled across a TWag v2 on the for sale forum and snapped it up. As stated on an earlier post, the silver cable made the most noticeable and welcome change of any cable upgrade for the HD650. Sennheiser should ship the Hd650 with a silver cable as stock and they would find it would attract a whole new set of admirers. They could call it the Hd675.
I have both the TWag V2 and the Toxic Cables SPC. Can't decide which I like more, in terms of sonics.