M42 bodies - Porst Compact Reflex SP aka Cosina CSR or CSM. One of the best in M42 because have a spot metering, is small. This camera have a one of the best mechanic. But this have a one problem. Switch of DOF and exposure. This switch be blocked with exactly Auto Rikenon 55mm f/1.4 ... Lens for this camera :Super Takumar 50mm 8 elements or SMC Tak 35mm f/3.5
K mount body : Z1 or K2DMD. Z1 have a 1/8000, good metering, AF. But someone say about a power (F**** battery C2...) I have a handmade powergrip with 4xAA battery and focusing screen from LX for MF
K2DMD because this camera is a tank ! Lenses : Planar T* 50mm f/1.7 (C/Y mod for PK) or SMC-K 35mm f/3.5
Film - Extar 100 or Pan-F 50.