Tempting, but I do love using the view camera. ;)
When I read about you guys with your RB67 Pro S's, it is like rubbing salt into a wound. I had two RB's at one time, and had to sell them to pay the bills. Later I bought a Nikon DSLR to use for stock photography. If you think taking a picture with a camera that has 20 different options is fun, well then run down to your digital store and buy one. The thing that really bugged me was that after I had made the decision to sell the camera after the last roll was done, I took it to the camera store to be developed and when I got it back the guy handed it to me with it on a roll and the film was not cut or printed. I told him I didn't want just developing, but then I saw the price...$3.00. That was a big difference from the $8-$9 I was paying. I put the film in my scanner and examined the shots. I had taken pics of my sister. The detail was out of this world compared to 35mm. I don't know if I will ever get another RB, or go to large format. The weight never was much of a problem with me as I always used a tripod. Perhaps the day will come when I will get another. The thing I liked is that the viewing with the WL viewer was like watching a TV. At 61 year old, that helps a lot with these eyes. Ric.
The big VF is a huge help (I am 67 years old). I also find the RB67 incredibly easy to focus. Basically I just keep the bellows wound all the way in, and I am in focus. My camera came with a couple of extenders, and I am going to try them out to see that affects focusing.
4x5 can be both smaller and lighter than an RB, oddly enough. My Tech III and older lenses makes a pretty light kit and a Chamonix or Tachihara would be a good two pounds lighter still. And if you like the 6x7 ground glass a 4x5 is just more better, never mind 8x10. But it's much more expensive in terms of film, much more hassle with sheet film and much slower to use, though that last combined with movements adds to its own reward too.
I used to own an RZ. If you want to carry around a large lens kit for an RB or RZ, it can get pretty heavy!
I sometimes miss my RZ. It was a great portrait camera.