i recommend Hockyhorrer leave this thread which he is putting absolutely no insight into. The man asked which HP book is best and you obviously didn't like them for whatever reason...so move on. And what do you mean by classics? How much more classic can you get? HP has sold more books than any other book ehhh....ever.
I couldn't stomach reading the LotR books. Like shakespear all over again. "He walked forth through the twighlight from yonder moon benign from the aghast creeping of the ablaze pearl set atop the mountainside, masticating distant stars in it's glaring wake" the cut the crap translation...."the moon was bright" The book was so wordy, not even Clinton could worm his way out of it.
I for one never read a single ENTIRE book all through school, faked my way through reports and exams on books. Then one sleepless night i picked up a random book on the shelf (which happened to be Sorcers Stone) and sat and read the entire book in a couple of hours. I was hooked from then on.
Getting back on subject Order of the Phoenix and Goblet of Fire are great and is difficult to decide between which is better. However, if you're wanting to read them, it is a necessity to read them in order as they all take place in Harry's successive years in school. Many refrences and characters are introduced throught the books and it would be beyond confusing to jump in the middle and read. Whichever you choose though, I hope you enjoy :-D