There are very many films in the Criterion collection that would be an asset to any DVD or Blu-ray shelf. At the moment, a good number of them are shockingly cheap too.
You can sift through a whole list of Criterion titles at Amazon yourself right now, and probably do yourself a lot of dollar-damage. I should probably point out some of the more notable offers, however.
David Fincher's film of The Curious Case of Benjamin Button is going for $5.99 on Blu-ray right now. Many will consider that a worthy purchase just for the epic 'making of' documentary included.
You can pre-order Brazil, the greatest film in the history of cinema, for just $20.99 ahead of its December 4th release. That's down from $49.95.
Chris Nolan's debut Following is just $20.99, also a pre-order ahead of the December 11th street date.
Godzilla is just $17.99, as is Hal Ashby's tremendous Harold and Maude.
If you want some Wes Anderson, I'd recommend Rushmore at $17.99, though the rest of his back catalogue is also going pretty cheap too.
I've spent an awful lot at Amazon this last weekend. I only hope it all arrives ahead of Christmas, so I can kick back and gorge myself.