Well, i wonder i didn't post my answer in this thread. I too ascended from RB67 to 4x5 recently. My first choice was a MPP Micro Technical, at first i chose it over the other press cameras due to the movements it offers. It's not huge amounts, but its way more portable than a monorail. I then later decided i didn't need that as much as a focal plane shutter, so i bought a Speed Graphic. I just got it in the mail two days ago and haven't had time to have any experience with it yet. All i can say is, the Micro Technical is very portable and has decent movements.