Keyboard

I’ve been looking into a good keyboard. I currently have a 3 year old Razer Ornata Chroma. I heard mech keyboards are better, and tried it for myself. I really, really, loved it! I’ve been doing some research, and come down to 3 choices, the Razer Huntsman Elite, the Ducky Shine 7, and the Corsair K70. Which choice is better, why, and what advantage does it possess over the others? Do you have any alternate suggestions, and if you do, why? I want a full sized keyboard with tactile switches (not Cherry Blue), and rgb. I also want it to be black.