I need some help making a choice. We live in the country in NE Texas. I have been carrying a D90 for about 10ish years now. Very happy with the camera. I use my Nikkor 70-300 AF-S lens most of the time - especially since my wife has really gotten into birding. I know the old adage that the best way to get a better picture of a bird is to get as close as you can, but sometimes you just can't. So we have been exploring some options for getting a little more reach.
I am down to a choice between buying something like the Sigma 150-600mm 5-6.3 Contemporary DG OS HSM or going to a camera that is more or less dedicated to the birding photos like the CoolPix P950.
Thoughts? Comments? Suggestions?