Looking to upgrade my 2nd QB in my 12 team PPR league which allows me to play QB's at the flex position. I am thinking that I can get a good QB if I offer Portis and and Favre.

Do you guys think this is a good idea considering my RB's? I've included my league's scoring below and my roster is in the signature.

Thanks for any advice!

FG - Field Goals 3 points
Plus 2 points for a FG of 45 to 48 Yds
Plus 4 points for a FG of 49 to 52 Yds
Plus 7 points for a FG of 53+ Yds
FL - Fumble Lost, Including ST plays -.5 points
IKRTD - Individual Kick Return TD 6 points
IPRTD - Individual Punt Return TD 6 points
Pa2P - Passing Two-point Conversion 2 points
PaInt - Passing Interception -.5 points
PaTD - Passing TD 4 points
PaYd - Passing Yards 0+ PaYds = 1 point for every 25 PaYds
Plus a 5 point bonus @ 400+ PaYd
Re2P - Receiving Two-point Conversion 2 points
ReTD - Receiving TD 6 points
ReYd - Receiving Yards 0+ ReYds = 1 point for every 10 ReYds
Plus a 5 point bonus @ 200+ ReYd
Recpt - Reception 1 point
Ru2P - Rushing Two-point Conversion 2 points
RuTD - Rushing TD 6 points
RuYd - Rushing Yards 0+ RuYds = 1 point for every 10 RuYds
Plus a 5 point bonus @ 200+ RuYd
XP - Extra Points 1 point

I agree with your strategy but I'm not sure who to target. Ultimately it'd be nice to get Portis involved in a deal where you end up with Peyton but I doubt that's going to happen. Eli is sort of an under-the-radar guy this season to put up really solid #'s and his acquisition cost is really low. i'd check him out possibly.

Beanie do you think I'd be OK (considering my scoring) with rolling the dice with Benson at my #2 RB if I do trade Portis?

I do have a ton of guys who could become #1's - Felix Jones, etc...

Portis isn't exactly safe anyway. He played hurt a lot last year and now he has bone spurs that we've never heard about. If you can get a decent QB in this league I would do it.