To be honest my own kindle (though it's not a kindle fire--I'm not sure what kind of kindle it is since it's an old one and it belonged to my mom) works pretty good for reading e-books and playing certain kinds of books but me using my kindle to surf the web is kinda hard and my arm gets tired of holding up my kindle for a long period of time. So, unless you don't mind holding up a small sized kindle or a large kindle, you might want to try something different for web browsing.
Thanks Hina, I think I'll get one, just for reading writings on Mibba, pure text, not using web browser.