heya ive been lurking occasionally on here, in a bit of a calibre phase
dunno how to jump into any discussion but i will say that the kindle fire is my first kindle as well, and it was a christmas gift.
i do know amazon kindle and nook are the best-selling ereaders, however when it comes to hardware reviews ive always trusted CNET --
http://reviews.cnet.com/ebook-readers/?tag=bc .
good luck