Thank you everyone!
The only lens that is plentyful or can even be found on the bay here in Germany is the J-8, others, not so much.
I can get the Summarit 2.4 but not in chrome, I am also not really comfortable with a Rokkor on an M, this seems to be quite difficult.
The little 3.5 Heliars look wrong if I'm honest.
I will stick to my Summarit for now and maybe I can find a decent Color Skopar some day.
Thank you!