1. Do those plugs fit at the ear-cup end alright?
2. Is red cool or bling?
1, yep, no issues with the NuForce, but don't know about the other but it seems fine from the pics.
2, I have the red one, and it is almost identical to the red from the cable of the Sennheiser Momentum, which you maybe able to check out from an Apple Store.
True. I use my red NuForce with my White, and the BoomPro Mic with the XL pads for my Shadow.
Yes, that's the point. The cable was designed for desktop use, so the shielding is slightly thicker than normal headphone cables.