One of my favorite musicians has a myspace music page with boring videos and mp3's of early, twee and relatively unambitious songs when in reality the person has matured into something phenomenal as anyone attending the live show will attest. Imagine if the Bunnymen advertised themselves with clips from the worst of The Fountain or Slidling when in reality they have works such as Kansas, No Dark Things, Flaming Red, In Bluer Skies etc.
On the other hand, if they show their best stuff someone will rip it, so they can't win can they?