As far as I know, just about any tablet on the market can be used to do the things you wish to do.
I personally owned several Android based tablets and was happy with them until I got a Windows based tablet. Once I got my first Windows tablet, I no longer had an interest in tablets running other OSes.
With a Windows tablet, I can run the same software on it that I run on my desktop or laptop. I can run the exact same browser, word processor, spreadsheet, etc... I can easily move files back and forth between my other computers and my tablet without the need to worry whether the files are compatible or not. About the only software I can't use on my Windows tablet are high-end games.
I personally have a Microsoft Surface Pro 3 which is an awsome tablet (it's actually an Ultrabook that doubles as a tablet) but you don't need to get one as expensive as that. What is your budget?