There are so many great anime movies...
Nausicaa of the Valley of the Wind ~ You have two Miyazaki films on your list already, and this is my favoirte Miyazaki film (although honestly every one of his movies is a must see, so you just outta head to IMDB and make a list of all his films and start on those)
Akira ~ An amazing film, it's THE anime film, and must be viewed.
Perfect Blue ~ A great psychological thriller, something you don't see a lot of in anime. Probably my favorite full fetaure by the late great Satoshi Kon.
Memories ~ A collection of three short films, with notible involvement from Katsuhiro Otomo (Akira), Satoshi Kon (Perfect Blue), and Tensai Okamora. All three of the short films are really great, with Kon's Magnetic Rose being the standout (personally I feel it's his best work)
