A like new Canon F-1 n, second model, body as part of my effort to have back-up in most shooting bodies.
A good Canon wide angle, and 135mm Fl or FD lens to go with the 50 - 55 mm lenses I have will become key to my bag, which includes Pentax M42 lenses may parallel a Nikon F bag, which I've also sought to build, as a working kit with a second body and a wide angle there also.
I've a Pentax Spotmatic that I really like and so far as the small format M42 camera's, a second, first model and lenses will augment both the Canon and Nikon, with by-way-of M42 adapters on both.
As I try to gear up for some cross country road trips, I'll keep an eye out for other kit, but I suspect my time is best served by filling in the gaps in 6x6 Hasselblad and lenses for my 4"x5" speed graphic, though I'd like better sometime in both camera and lens.
Cheers.