I have a K2, and will address some of the questions.
dictionary, very easy. you just bring the cursor to the word in question and the definition pops up
the kindle will handle several thousand books and documents
collections; haven't been using it, so I don't know
keys; I'm not sure which one is having the problems
crash; that was with the unlighted cover, has nothing to do with the browser. the fis is, don't get that cover! ;o)
I'm sure someone else will be along shortly that can handle more of the info. feel free to ask away!