Folders are fun, but realistically, they're not going to match a modern system camera for image quality, and you need to decide if that's an acceptable tradeoff.
For me, the whole reason to shoot film is to get a completely different look from what I get with my digital Nikons. I just love the softer, low contrast quality I get from pre-war uncoated lenses. I own two folders from the 1930s, one from the 1920s, and one from 1914. These are all 6x9 format, and while still fairly compact (more so than any of my Nikons for sure,) it would be hard to beat a 6x6 folder for compactness and maintain fairly large image size.
Kent in SD