Wasn't aware there was an original.  The Mrs and I went to see 3:10 to Yuma a couple of weeks ago, and I thought it was pretty good actually (although I have always like Horse watermelon and Gunpowder movies).  
Bale (sp?)  was good in the role, although I might have recast Crowes part.
All In all though a good "Duster", I would buy this movie.
So, it was a remake of an older Duster?  Who was in it?  I'd like to see it.
cheers,
RTR