I am a Milla Jovovich fan and would pretty much watch any movie she does.  That being said, I am not necessarily a fan of Zombie movies, but the Resident Evil series is the best I have seen.  The production values are always good (sound, visuals, lighting, etc) and the stories are good considering the subject.  I have the entire series on Blu-Ray, and from time to time I will watch the movies as a marathon.  I always see something I missed in prior viewings.