Should I drop McNabb for one of these guys? (Dynasty league)

[Saintsfan2004]

I have had Mcnabb for the last four seasons in my dynasty league. This season he has been frustrating me to the point where I need to look at my QB for the future. I have three options that I am looking at.

Eli Manning
Sam Bradford
Chad Henne

Out of these three which QB will give the best chance for success this season and in the long term? Or should I just hold on to Mcnabb for the rest of the year?

[Perfectibilist]

Dynasty league I would make a move for Bradford. Call me biased (as a Cowboys fan) but I absolutely despise Eli Manning, and I still don't know if Henne has what it takes to be an elite QB. Once Bradford gets a little more experience and some better WR help he's going to be a beast for years to come.