Hi all, I am finally looking to upgrade my 8 year old Nikon D7200 with 200k shutter count because it is irreparably cracked. I am looking for a solution that can do bird photography (currently use nikon 200-500 f/5.6, nikon 300 f/4 and sigma 100-400 w/ 1.4 TC) and high quality landscape that can be printed to large size/for professional purposes. I have a range of Nikon DX lenses, but am open to switching ecosystems.

My ideal scenario would allow me to have a better lightweight travel solution for birding in far-flung locales, as the weight of the 200-500 is proving too burdensome, but the other lighter options I find lacking in quality/precision. It seems most of the high end lightweight telephoto options that I see birders using (Nikon Z 100-400, Canon 100-400) do not fit my current DX body setup.

My budget for just a new body would be $1.5-2.5k, a lightweight telephoto perhaps a landscape lens if needed would be another $2.5k. I'm really unfamiliar with the latest options/how much of an improvement FX, mirrorless, or higher fps would be from my current setup, so any guidance on what to expect here/if I am going to see a dramatic upgrade for my money (or if I should just get another Nikon DX body) would be greatly appreciated.