Which QB should I start this week? Palmer/Smith/Hasselbeck??

[Bo_Sox]

I have been thinking this week that I would start Hasselbeck......but now I'm hesitating with all this I've read about the Cards D improving the pass rush (not to mention Hasselbeck got dominated in the first matchup).

Here are the other two I have:

Palmer vs PIT
or
(sleeper of the week?)
Alex Smith vs Bears


What do you guys think??