It's Brady, Rivers and potentially Vick and Rodgers for me.  Manning can climb back in but I doubt he'll be able to.
		
		
	 
I actually think that Matt Ryan should be the front-runner right now.Philip Rivers and Aaron Rodgers are both playing great, and they're right there in the mix.
Manning and Brady are going in opposite directions. Manning has really hurt his chances over the past couple weeks. Brady still has some catching up to do after a bit of a slow start. But either of those guys could get there by the end of the season.
Michael Vick has a few things working against him (fewer starts, dog-fighting), but he's in the conversation as well.
I don't think any offensive non-QBs should be in the conversation. But on defense Trent Cole, Tamba Hali, and Kyle Williams would get consideration in a less press-clippings–driven world.