[sdiy] Momentary Toggle Switch question

[Fahl, Romeo]

I want to order some high quality momentary toggle switches so I can
finish putting together my Milton sequencer.  All I need is a simple
SPST or SPDT switch that has a voltage on one terminal that gets routed
to the other terminal when the switch is held down.

Going through Mouser's catalog, I'm a little puzzled at the different
options available.  Which of these would be the best choice for that
purpose? 

SPDT - On-None-(On)
SPDT - (On)-Off-(On)
SPDT - On-Off-(On)

Thanks,

Romeo