Fortenbaugh talks about how you should build a team, and while he says having a stud QB is a given, the next priority has to be a pass-rusher:
"You can’t win championships if you can’t get to the quarterback, as evidenced by the fact that seven of the last nine Super Bowl Champions have ranked sixth or higher in the NFL in sacks."
"Bonus Stat: The two teams that qualified for February’s Super Bowl (Pittsburgh & Green Bay) finished the regular season ranked first and second, respectively, in the NFL in sacks."
I have to agree with him, and think Aldon Smith was a great choice for the 49ers.
Here's a link to his article: http://www.nationalfootballpost.com/Who-would-YOU-pick.html