Not a bad list, fellow Bat-fan!
Check out the following too. I'll make it easy and put the trade paperback titles:
Arkham Asylum
No Man's Land
Batman Adventures: Mad Love
Emperor Joker
JLA: Tower of Babel
JLA: Identity Crisis
The Killing Joke (just reissued on its own, but can also be found in the excellent Alan Moore DC Universe TPB)
The Man Who Laughs (just recently put back into print)
Also, the really early Batman stories by Bob Kane and Bill Finger (especially the first appearances of the Joker) are must haves.
