I picked up the 4 Batman 1989 - 1997 films boxset for £10 from Tesco, so far I have watched the 2 Tim Burton films.
Batman - 8/10
Really enjoyed this, especially Jack Nicholson as The Joker and Kim Basinger looking lovely.
Batman Returns - 7/10
Not quite as good as the first one but still really enjoyable, The Penguin is creepy as hell and bonus points for Michelle Pfeiffer in a leather catsuit.
Sadly I still have Batman Forever and Batman & Robin to watch, I know not to expect much from these 2 films!