I'd wait for their first CD, when Trujillo writes some own shit (If he's allowed to.
). As many people mentioned, he didn't write something for St. Anger.
You can hear on Suicidal Tendencies or Infectious Grooves CDs that he can do a good job on the bass. But it's more funky, that will, i think, never happen on a Metallica-CD. Ok ok, at the moment everything's possible in this band.
But i think it's possible, that he'll make some real cool songs.
So, at the moment i won't prefer Jason or Robert.
Read the first post and you'll see your post is absolutely irrelevant.
Although some people said, that Les Claypool was a candidate, too. That would have been interesting.