If money is not really a problem you could use the 3rd gen iPad Pro with 12.9" display and apple pencil. The default note taking app works well enough. It's kep

If money is not really a problem you could use the 3rd gen iPad Pro with 12.9" display and apple pencil. The default note taking app works well enough. It's kept my notes over the last several years. The pencil is pretty great for drawing diagrams and figures, so I would definitely purchase that with it. I found the 12.9" display works best for me, because I like to split the tablet window in half with 1 app on each side with my notes app usually being on one of the sides. The other apps I use alongside the notes are brilliant.org's app and pdfs of math or programming texts. If your looking for something more around the ~$400 range you may look at a cheaper alternative. I've seen advertisements for this paper-like e-ink tablet Remarkable [1] quite a bit and it seems like it might be a nice alternative. [1]: https://remarkable.com/store/remarkable https://remarkable.com/store/remarkable