[vimeo]http://vimeo.com/114644960[/vimeo] Three of the most exciting cameras of the year, the Sony A7S, Panasonic GH4 and Samsung NX1 are about to go into a different league as far as video quality and monitoring go. The Atomos Shogun 4K monitor / recorder is now shipping ($1995 / ÂŁ1220 + VAT) and one is on the way to me, scheduled to arrive this week. I plan to put it to use with all 3 of the…