I would stay away from the SPC/Silver variety cables then.
You have much fewer options when it comes to a pure copper cables that plays to the strengths of the Senns.
If it makes you feel any better I also have a Cardas, Zu, SAA, various Moon Audio cables, Headphile, and APS cables... just don't use them much. I would be a crappy MOT if I didn't know my competition.