I can vouch for the iPad + Apple Pencil + GoodNotes combo. I‘m using this multiple hours a day for university. The iPad also would be the most versatile device for watching a movie, playing a game etc.
You can also get other tablets but in my experience the writing experience isn’t as good as the iPad.
If you want to do mostly reading, an e-ink display will be nicer on the eyes, but you loose general functionality.
Thanks for the reply. Yeah, I guess I have to try the lens out myself first to make a decision. If it wasn't so damn expensive, getting it would be a no brainer