I would start Chambers, Conway and Owens. That's a nice squad you have there, and if it wasn't TO, I'd give the nod to Muhammad. You can't sit Owens even after a couple of bad games.
I like Brady. He's younger, cheaper, and seems to have his team mates behind him. Bledsoe is a very good quarterback, and maybe even better than Brady right now, but Brady was the right choice for New England.