An 8x10 Deardorff is mega beyond cool! Drool worthy, in fact.
I find the rest pretty cool too, but particularly the Graphics, the Graphlex and the Mamiya. Love TLRs and press cameras. But that's just me.
It isn't medium format though. And, to be truly ultimately cool, the Deardorff must be mounted on a wood tripod and be fitted with a Dagor (preferably German version) lens.
They're a pretty good chick magnet, too - they don't attract the nutty ones like a Harley does.