I went from a Canon DSLR (T5, I think?) to a Canon RP three years ago. My budget was $1,000 and I bought just the body and the adapter since I already had several lenses that would transition over. It’s full frame with the capability to change the cropping/aspect ratio to several options, including 1.6 for those crop sensor lenses. I’m very happy with it. It’s traveled from the Caribbean to Europe to the Galapagos and it has performed like a champ. I’m sold on mirrorless. I take mostly nature photos with some travel shots thrown in as well. Good luck with your decision-making!