I've been reading them again too. I just finised PoA last night, and now I'm going to skip straight to Half Blood Prince because I just read Goblet of Fire again in November/December, 'cus it was the only one I had available at the time (and I saw the movie about 20 times on HBO during Christmas break), and I refuse to get the Order of the Phoenix book fresh in my head again just before I see the movie. It totally ruins the experience. I had PoA fresh in my head when I saw the movie for the first time, and it sucked... everything seemed to be happening so fast and I kept thinking "but they forgot to mention.." etc. It was much better with Goblet of Fire when I hadnt read the book for at least over a year.
The first 2 movies I saw before reading any of the books, so I was ok on that one.
"Guns don't kill people, I kill people."