Pentax MX and 28/3.5 Pentax-M. Just for a change from rangefinders.
Incidentally, there's no logical reason why I should prefer it to my OM1n and 50/1.8 - the bodies are much the same - but perhaps it's that MX shutter release that seems to be so well-synchronised with my picture-taking reflexes that taking a picture becomes one single action that ends with that precise and perfectly defined clunk.
On the other hand it might be because in the 1970s and later I spent many many happy years just with a screw-mount Pentax SP1000 and a 28/3.5 Super Takumar, using Tri-X and Kodachrome 25, occasionally using a Super Takumar 55/2.0. It was all I needed then, and perhaps it's all I need now.