Thoughts on QB

Just started up a keeper league and So far I have:

Westbrook, Jones-Drew, Javon Walker, Andre Johnson

They way it looks these will be the be the Quarterbacks that I might have a shot at when it rolls back around to my turn

Hasselbeck, Big Ben, Romo, Rivers, Schaub, Alex Smith, JP

Any thoughts on which way to go. I am sure that at least 2 will be picked out of Hasselbeck, Romo and Rivers.