Ako I dont like reading the novel then watching the movie - it's the worst spoiler IMO, not to mention the book version is always richer in terms of story and details - Jack Ryan movies, Da Vinci code stuff, etc. So I prefer it the other way around.
I would suggest that you find the extended millenium trilogy movie (3 hours x 3), then pagkanood mo, read the book.
BTW, maski ba sa book version, tipong mukhang hindi naliligo ang main characters? hehehe
The Girl with the Dragon Tattoo (2009) - The Swedish version had a very good adaptation to the novel. Good thing I was able to read the book before watching this. It saved me a 2nd viewing. Noomi Repace had an exceptional performance. As true as the character in the novel. The sex scene with Blomkvist and Salander was artistically done. ASTIG! Looking forward to the Hollywood version.