Does anyone use a tablet to annotate readings/books?

I apologise for the length of the question here but I want to make sure I give you a clear understanding of my problem and the advice I seek.

I read a lot of academic texts – pdfs and increasingly e-books. I have a Kindle and since buying it have bought many more e-books to assist my research. I never intended to use my Kindle that way but I can get e-books quicker than I can obtain hard copy books and they are usually cheaper. This has led to another problem for me.

I like to make notes (and usually use Word) as I read and copy direct quotes into my Word notes plus including my own thoughts/questions/reminders to look at other texts. I can highlight on a Kindle but I can’t print off those notes and this is a very limited way for me to engage with the materials.

My question therefore is, is anyone using a tablet in a research/academic context and if so, which tablet do you use, do you use a particular app such as ‘Annotate’ and how effective is the app you use. I want to be able to make lots of notes (typed, even I can’t read my own writing these days), and collect key quotes and to be able to print them off to work with as I write.

Any advice would be gratefully received. I am putting this in general but would appreciate full, on topic answers about how other scholars use tablets and annotating software.