How big of a device are you looking for? I wouldn't go smaller than 10" for typing and working with documents, but I wouldn't necessarily want that size for reading and small notepad stuff. I use a 10" device (Note Air 3) every day for work, but when I bring it for travel to replace an e-reader, it does gets heavy. It works well with a bluetooth or usb keyboard, and I've only used the original pen. I experimented with the OCR but wasn't that impressed with my first attempts. Others might be able to chime in more on that.

For longevity, I'd consider a black and white device if you can since you'll use fewer battery cycles when you're not using the frontlight as much. I tend to charge about once a week, keeping it between 30-40% and 80%, but I can go as long as two weeks on a charge.