Blackmagic intensity extreme works the best with any HD camera. The newer iphone5 cameras with air beam are also a good option. Faster wifi than previous iPhones and you can even use it with Motrr Galileo for remote controlling the camera. Ive used a macbook, iphone4, iPhone 5 and iPad + a canon with intensity extreme all at once over a year ago. Checkout the video I made. I used an mpd32 to switch cameras You can tell the difference in cameras thats for sure but the new iPhone 5c is the 1!!
http://vimeo.com/70716976