I would go wi the OCC Copper Zeus cable from AphroditeCu29.com
I made a comparison between a T1 with the Black Dragon and my T1 with the Zeus and IMO the Zeus was better sounding. More detailed but at the same time smoother.
Right now I am comparing my DHC Complement cable in my HD800 to a Zeus and to be honest they sound basically the same but the Zeus is less than half the price of the Complement.
I know Robert offer them for both the HD650 connectors and the HD800 connectors so you just buy the one for the HD650 noe and then when you are ready just send it back to Robert to change the connectors to HD800.
I have personal experience with the Balck Dragon, Silver Dragon, APS V2 and V3, Enigma Audio Oracle, DHC Complement and the Zeus. To me the Zeus and the Complement are at the top in sound but the Zeus is alone at the top at comfort (it is very light) and price/performance.