I’ve used a variety of 6x7 cameras, including the Koni-Omega M and the RB67, but my favorite, by far, is the Pentax 67. I use both a later model P67 and the new 67II in an aerial photography business, and would certainly spend the extra to get the newer 67II. The built-in handgrip makes it much easier for me to use in quick, handholding situations.