I finally tracked down something I've been after for years now: An IBM Model M keyboard! (This one being a 1996, blue logo)
I've been using it as my keyboard at work for the last week, and it's been awesome. I can see where its reputation comes from. Those buckling springs make such a great sound, and are nice to type on.
It's really heavy and sturdy too, pretty clear why some classify the Model M as a blunt weapon as well.

Also damn, keyboards are such a pain to draw, especially one with a curved baseplate like this. x.x