They may not be the ultimate Expo rigs, but they have lots of cool factor in my book.
I'm a sucker for a cool Early Bronco, although I've never actually owned one. Probably goes back to Parnelli Jones "Big Oly", it's one of my favorite old school desert racers.

A sentimental favorite when I pit with BFG is to see the Moss Brothers out there getting it in their 300 Class desert racer. It's a '79 chassis, so not an EB but still cool to see the old iron out there.
http://www.wcb4x4.com/race/moss/index.shtml
Coan Racing/Dust Junkies Racing, 2012 Baja 1000 Class 1700 Champs
Dust Junkies Racing/Fat City Racing, 2010 Baja 1000 Class 1700 Champs
Fat City Racing/Dust Junkies Racing, 2009 Baja 1000 Class 1700 Champs