The Furutech connectors will be the FP-601M Gold XLR or the FP-101 Gold RCA.
I am updating the site as we speak with price per additional length. I had to calculate out the additional cost and didn't get to it last night.
The flexibility of the Apex will be excellent. Stiff cables especially when it comes to headphone cables is enough to make me never use them no matter how good they might be. The Apex is not as light and flexible as the Oracle (which is the lightest and most flexible headphone cable out there) but is pretty close. The Apex uses a thicker wire and thus will be a bit heavier and stiffer but will still be better than just about everything else out there.
Lastly, as to why copper for the Apex. Cheap copper can sound dull, grainy, flat, and veiled. Nice copper, like that of the Apex, can take those weaknesses and turn them into strengths. Gone is the grainy, dull, veiled sound. The Apex does everything the Oracle does but just a bit better. More depth, greater soundstage, better detail, speed and overall accuracy. These are some traits you expect from silver but that can be achieved with copper while eliminating the harshness, brightness and lack of depth you can find with pure silver.