I&m a huge Fire user, I have a fleet of the things and virtually every model they make.
The one I carry the most is the 10-inch Fire HD because it is best for videos, I don''t have to flip the pages as much when reading, and it does a better job, in my opinion, than the smaller devices with web pages particularly those with forms.
The new Microsoft Surface GO is in the same size class and I&ve been messing with it a bit.
It stands out as being even better with web pages, it runs full Office, and it has a far better keyboard solution but the apps for movies and books aren''t as good as the Fire&s.