There are Super Multicoated Takumars in M42 mount, as well as some Super Takumars that are multicoated just the same as SMC Takumars. My K-mount Pentax 50/2 SMC lens is fantastic!

In M42 mount, I like The Tomioka-made Rikenon 55/1.4 and Pentax 55/1.8
The Yashinon 135/2.8 is nice but mine isn't as contrasty as i'd like.
The Fujinon M42 lenses are superb! There is a russian-made Helios 40 85/1.5 which i'd love to have..