I didn't think they were too trashy, or at least I chalked up the slightly-trashy feel to quirks of the Swedish-to-English translation. I did enjoy the first one a lot - couldn't put it down. The second I thought was very good. The third one really disappointed me - not only did it have a minimum of Salander, with whom as someone with an autism spectrum disorder I can identify, but unless you both know something about and care about the last 40 years of Swedish politics (and I don't), it was pretty esoteric. About all I could say is that I remembered who Olof Palme was and that he had been assassinated.

OTOH, the third book did make me feel better about the fact that it looks like 4, 5, and 6 won't happen (mostly due to conflicts between the author's life partner and his family; he died intestate).

And I got a Kindle from my in-laws for Christmas. I like it for solitaire, crossword puzzles, and a bunch of free public-domain books, but I can't see it ever replacing real books for me.