As SLR I use a Contax RTS II. This is a fine mechanical camera continuing the first RTS model. The RTS II however has a number of features that the RTS does not have. For example it has an EV-lock, a shutter  that works without batteries, an exposure correction dial etc. The main advantage of the Contax system is,however, that you can use the excellent Carl Zeiss lenses.

More information on Contax cameras and lenses see this link

I own the following CZ lenses:  50mm f/1.4, 50mm f/1.7, 25mm f/2.8, 35mm f/2.8, 85mm f/1.4, and 135mm f/2.8. Since I almost exclusively use short lenses, my almost unused 135mm is for sale. Contact me if you are interested.

As a second body I use the Yashica FX-D, which is well compatible concerning the lens bayonet and the light-meter system.