I've owned a few classics. Settled on the Voigtlander Perkeo II with Color-Skopar plus accessory uncoupled rangefinder. It's very compact, and I'm dubious of any of the classic 6x9 folders' ability to hold the film flat. Even the best ones are of relaitvely light build, as you might expect of a tourist camera. 6x6 is less of a flatness challenge.