I say pump even though I love my autos (mostly Browning over the years). It's one thing to have a malfunction in the duck blind and quite another to have a malfunction in a defense of life or property situation.
I've personally been eyeing this one for a while:
http://wilsoncombat.com/new/shotgun-...p#.UTW-0-jz6po
Having said this, unless you train with it, you won't be proficient (especially a pump).
Just my .02.
Joe