We're big fans of the Zacuto rigs, but that goes hand in hand with being 5D addicts.  Jens from Zacuto talks about the Z-EVF at NAB. Nice drop test. Apparently they've done drop tests from up to twelve feet high, so fairly robust as well.

Thanks to our friends at DSLR Newshooter for this story, if you want to find out even more then take in the Zacuto page, but this is what they've got to say about their product:

Zacuto is transforming the form factor of DSLR cameras for video with our electronic viewfinder. The Zacuto EVF is a 3.2” high resolution monitor that is used in conjunction with all the Z-Finder models. This electronic viewfinder is compatible with all cameras with an HDMI output including the Panasonic AF-100, Sony FS100, Sony F3, Scarlet, Red One & Epic. This electronic viewfinder allows you to operate the DSLR camera or any camera with an HDMI port, with the correct form factor for video with the camera "in-line" to your rod system (the most stable way) and your eye in the Z-Finder offset. This is the way all film cameras and ENG video cameras were operated and we, at Zacuto, believe this should be the way DSLR cameras should be operated. It will enhance the stability, give you better resolution, allow you to get your eye where it most comfortably needs to be, enable low mode shooting, shorten your camera package, have your electronic viewfinder in the back of a dolly or crane, detached from the rig for car shots and more.