Keep in mind that's southern wheeling. Big hill climbs, where "crawling" really doesn't work. It's all done on privately owned ORV parks. There's all sorts of famous hills and obstacles where competitions are held (Cable Hill). These sorts of things draw crowds and bring in money for the park. Yeah, it doesn't portray the best image of our sport, but neither does "mudding". I'm sure the same can be said about some the "timber crawling" we do here in the PNW.
MadRam's videos are always entertaining. I think some of the the buggies are ugly as hell, but that's the southern "rock bouncing" style.
Personally, I'm more of a fan of West Coast style. :greensmok
To answer Ben's original question though, I'd build a Suzuki Sidekick or Geo Tracker.