Are the Patriots in the Market for a QB?

One would tend to think that losing Tom Brady to injury in week one of the '08 season was unfortunate, but he'll be back next year, and in top form right?  Well consider this; although Colts QB Peyton Manning didn't tear anything in his knee, he did have surgery on his knee to clear out some scar tissue.  The Colts are currently sitting at .500 with three wins and three losses, proving just how tough it can be for a franchise quarterback to comeback from an injury. 

But Tom Brady is Tom Brady right?  Granted, both Mannings along with Brady are Super Bowl MVP's, but we're talking about one of the best, if not the best in the league.  Love him or hate him, Brady's stats speak for themselves.  Which is why I beg for you to consider this fact as well.  Has anyone read the story on former Bengals Linebacker Reggie Williams on NFL.com?  Better yet, have you seen the picture of his knee?  That picture was taken after multiple knee surgeries to try to control/prevent infection after a similar major surgery to the one that Brady has undergone.  Up to this point, Brady has had four surgeries.  One to fix his ACL, and three to try to prevent (and at this point, probably prevent the spread) of infection.  If Brady's knee turns out the way that Williams' did, his career could be in serious jepardy.  Which begs me to ask you the SB Nation fans, are the Pats soon going to be in the market for a new quarterback?  Now, this is not a slap to Patriots backup quarterback Matt Cassell, who's played admirably up to this point, but it seems clear that Cassell is at best, a backup.  If the Patriots are in the market for a new quarterback, who do you think could be the next Patriots "franchiser?"