I liked the second book...not my fave, but I didn't think it was boring or anything. The fifth one dissapointed me--I didn't like the ending. I thought it was rushed, (SPOILER)and the whole mystery behind the prophecy wasn't worth the buildup. What did we learn--that Neville could have been the "boy who lived"? Whoopdee-doo, that really progresses the plot. Also, Sirius's whole death scene happened to fast for my liking.....the final parting should have been more emotional. He was a great character, and I feel that his potential was totally stolen from the series. Just--BAM--wiped out of existence....no last words to remember him by or anything...*sniff*

As for whether to read or watch the movies first....I recommend reading first. You'll understand the movies better, and you'll get to scream, "OH, I REMEMBER THAT FROM THE BOOK!!!" like a total idiot, like I did, lol.

Also, its a verrrrrry long time to wait.