All this talk of the beach has me dusting off an old Nikon EM w/ 50mm E series lens for use on my vacation that starts this weekend. Thanks for the tip all.
I've always brought my "beater" Nikon FM2n out to Burning Man, so in my book it qualifies as both second string and knockabout. Every year it gets subjected to enough heat to gum up the adhesive on the light seals, and enough dust to warrant a full cleaning by one of my trusted techs when I return. I've seen people shooting with Leicas and Hasselblads out on the playa, and certainly many with weather-sealed DSLR bodies. I just can't bring myself to subject the M8 to the conditions out there. And I've always been happy with the results I've brought back from those adventures.
Don't get me wrong: it is a great camera in its own right. I've been using it since purchased new in 1985 and it's served me well. It is however well-worn - so much so that it's simply not worth trying to sell at this point. What passes for brassing on a Leica simply looks like age on a Nikon!
I vote for the FM2n with a 50/1.2 as the best knockabout camera ever made...