I play in a 12 team PPR league which allows me to play any position at the Flex spot (even QB's).

With that rule, I'm looking to upgrade my 2nd QB.

I've been offered the following deal:
I get Peyton Manning
I give up Portis and D. Jackson

My current lineup:
QB - Rivers
RB - AP
RB - Portis
WR - White
WR - D. Jax
WR - S. Moss
TE - Shiancoe
D - Vikings
K - Nedney
Flex - Favre

Bench: C. Benson, F. Jones, C. Brown, J. Forsett, J. Gage, M. Clayton, J. Davis, L. Moore, J. Nelson

My projected lineup:
QB - Rivers
RB - AP
RB - Benson
WR - White
WR - J. Gage
WR - S. Moss
TE - Shiancoe
D - Vikings
K - Nedney
Flex - Manning

Bench: B. Favre, F. Jones, C. Brown, J. Forsett, J. Gage, M. Clayton, J. Davis, L. Moore, J. Nelson

What do you guys think? Too much to give up for Peyton?

Absolutely accept that deal.

Youth? Why? I'm nervous about having Benson as my 2RB and Justin Gage as my 3rd receiver.

The ability to start a QB at flex significantly increases the value of QBs in a league. A QB in the 10-20 range is going to significantly outproduce a RB in the 21-30 range... and have far more security to achieving at least 10 points every week.

That said, the ability to start 2 of the top 7 QBs in fantasy football every week is far too good to pass up; definitely worth sacrificing Portis and Desean.
-DEFINITELY sell high on Portis, dude looks washed up and his Oline is falling apart. Benson is not that big of a downgrade, if one at all in a PPR. Besides, Felix Jones in a PPR is a fine backup option on the bench and ready to go.
-Granted, losing Desean and being forced to start Gage or Moore is a downgrade. Look to see if Sims-Walker, Wade or others are on the bench over Jordy Nelson.

Nevertheless, the value added of starting Peyton Manning over Favre FAR, FAR outweighs starting another WR over DeSean. Portis doesn't really catch passes and his value is going nowhere but down.

Thanks Youth....i see what you are thinking now.