Leaving Sony?

Hi all. I started doing video work about a year ago and have been shooting on a Sony a7iv. It is a great camera especially since I enjoy photography as well, but ultimately I would like to become a DP and am looking for more video focused features. I am on the fence about staying with Sony. My main considerations rn are a blackmagic Pyxis, red Komodo, or stay with Sony and get an fx3 or fx6. I feel like the color science with my a7iv is somewhat disappointing, but to be fair I need to learn how to use davinci resolve better. Are the other cameras mentioned particularly bad in low light? Does that out weigh their color science and rig-ability? Lmk your thoughts.