I want to take an HD/SDI feed from my camera to a switcher. I have regular BNC video cables and I was surfing the net and found HD/SDI BNC cables. Do I really need to upgrade? If so why? Thanks for your help.

This may help:

http://www.dvinfo.net/forum/convergent-design-nanoflash/235445-questions-relating-hd-sdi-cables-remote-trigger-nanoflash-application.html

Thanks Brian. I'm looking at doing 100-500 Ft runs. Does anyone know what would work best. I see a lot of RG6 and RG 59. Does it matter, or just spend good money on Technec or Canare?