I think all 4 guys will have their careers made or broken by who drafts them. Russell and Smith seem to me the most likely to be able to endure landing in an environment such as Cleveland or Detroit, where they are wanted to essentially be the same as Vince Young, Matt Leinart, Michael Vick, etc. as the man that will be the rallying point as the team builds itself out of the pits.
At least Detroit has Mike Martz going for it. But how long he stays in Detroit, I'd be surprised if it's beyond 2008. The only reason he is in Detroit is because nobody else offered him a job last February. As soon as someone offers him a head coaching gig that isn't Oakland, he's gone.