One of my all time favorite series of movies is The Fly. My first exposure to The Fly was Siskel and Ebert's review of Cronenberg's remake. The clips they presented on the show blew my mind and I could not wait to see it. Of course, it was rated R and I was a kid who wasn't allowed to have any fun, so it took me a long time to finally rent the damn thing! But it was worth the wait.
I lucked into The Fly II (sequel to the remake) for five bucks at Dollar General. Great movie, but the real treat is the documentary on disc 2, a great feature that covers all five films.