Since there is some interest in Oyaide, I'll share my thoughts on the various Oyaide cables I've tried. I'm in Singapore, and we have a local dealer that makes sourcing their cables easy.
Power Cords
PA23 - Thinner than the monstrous Tunami. Good highs but a bit lightweight sounding in the bass
Black Mamba V2 - Quite neutral and detailed. Super value for money. Not as heavy handed as the Tunami.
Tunami GPX - Warm tone. Very low noise floor and very powerful bass. Some may find the top-end a bit lacking
Tunami GPX-V2 - Improvement over the original Tunami. This is more open sounding.
Interconnects
Tunami Terzo V2 - Detailed and super smooth and laidback.
AZ910 - Similar to the Terzo V2 but with more detail.
Digital Cable
DB/DR-510 - This is the FTVS-510 bulk 75 ohm pure silver core cable with Oyaide's BNC / RCA plug with pure silver center pins. These aren't bright sounding at all, but instead have a high detailed yet warm and full balance.