I think all of them have the potential to be good NFL players. From what I've seen, I've seen positives from Brohm, Quinn, Smith, Russell, and Stanton. I like Quinn, Smith, and Russell the most, but then again, I've seen more from them in order to like them.
To answer your question, if the Falcons trade Schaub and then decide after 2007 that they don't want to keep Vick around, then it's a pickle we're in. I'd love for us to land Troy Smith, but I know there is ZERO chance we get him. Smith is an upgrade over Vick. I agree with the article. But at the same time, I'm not sure I'm ready to rebuild right now, and wait 2-4 years before Smith is ready to play and go back to being the team we were in 2000 and 2001.
So if that situation proves to be the case, the Falcons simply are in a predicament where they will have to start from scratch in 2008. Maybe they sign a player (Marc Bulger is a free agent), maybe they draft someone (like Henne, or Brohm, who I don't believe is going to come out).
As for the Browns, although drafting Smith makes sense because he is a better player than Frye, the Browns needs extend beyond having a so-so QB. They are the 30th ranked run offense and 31st ranked run defense. The Browns would be better off putting the talent around Frye (or whomever) first before addressing their QB situation.