After reading about Voigtlander RF's and framelines getting knocked out of whack, they do not make an impression as a rugged camera. After reading about M6 light leaks, I would always keep one in a fitted case.
Looking at my "beater" Nikon S2, the 219th made and owned by painter for 30 years who must have used it as a hammer, it gets my vote for #2 position. The Canon 7, which G-Man now has, took a fall so hard that it sheared the solid glass prism used for the framelines. It was a rear lens cap when I got it. Got the glass shards out of the gears, glued the prism back together, got the framelines working, everything worked. Joe even poked his finger through the frameline window, and it just kept on going. Most rugged RF I've ever seen.
So, you want a rugged, feminine camera. How about the Limited Edition Leica M6 Titanium Xena Edition?