Manning is the safest bet no matter what. I wouldn't trade him for any other QB.
But Brady could end up with better stats. Romo and Palmer will fall behind Peyton though.
QB - Manning, Ben Roth, Campbell
RB - Henry, T Jones, D Ward, B-Jax, Betts, B Jacobs, Selvin Young
WR - Lee Evans, Colston, Driver, Cotchery, Brandon Marshall
TE - Heap
K - Elam
DEF - Chicago