All this Filco chatter piques my curiosity. What's so great about a Filco?
As to what I'm using right now, the keyboard someone will have to pry from my cold, dead hands:
an IBM Model M keyboard. Part #: 1391401; ID #: 2055523; date of manufacture: February 4, 1988. Repaired by Unicomp, Inc. December 2007: replaced backspace buckling spring assembly