Got to decide before its too late
For me Belle is his best film since Summer Wars. It doesn't quite live up to it but it's still excellent.
I'd put it up there with my other two favourites of mine which are The Girl Who Leapt Through Time and Wolf Children (the other film of his that I really enjoyed was The Boy and the Beast though I don't think that's quite as good as those three). Keep in mind that the standard Blu-ray is much cheaper if you just wanna see the movie, but it is a very nice set that AL did for Belle