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I for one is awaiting for the world to completely decompile and or reverse engineering the IBM mainframe microcodes for all their machines.

Number 1 because Mainframes without the microcode is sent to the junkyard.

"We weep for the blood of a bird, but not for the blood of a fish. Blessed are those with a voice."

Applies here. SGI hardware holds interest because "ooh pretty animations/GL". IBM is great stuff, but it's all workhorses.