Wow, your're right, that was a lot of information. BUT it did provide a clear explanation of where you are and where you are thinking of going. First, I will address your team outside of defense (I know nothing about IDP leagues):
QB: Michael Vick - Awesome. Big fan of Vick, especially in a league that rewards the big play.
WR: DeSean Jackson - Awesome. Will provide 40+ yard receptions.
WR: Brandon Marshall - Awesome. Excellent WR2 especially in PPR leagues.
WR: Plaxico Burress - Good. I agree that he is in for a lot of red zone targets. Not a bad WR3.
RB: Shonn Greene - Good. I like Greene, but am concerned about his lack of big-play potential and few receptions.
RB: BenJarvus Green-Ellis - OK. Not a lot to get excited about. Should be an ok RB2 in a 14-team league.
TE: Dustin Keller - OK.
W/R: Roy Williams - Not Good. I would move Moore into your starting lineup when his is healthy. Williams seems to have a lot of bad karma right now.
Bench - Freeman is great backup QB. Moore is a potential every-week starter. No backup RB could be a problem in bye weeks.
So, I actually really like your offense. Your RBs are definitely your weakness, but I don't think it is enough to take you out of contention.
As for making a trade to improve your team, I would not consider any of the trades you discussed other than Brady and Forte. Even then, I think Vick is significantly more valuable than Brady in a league with your scoring settings. Brady does not have big-play receivers (Ocho stinks IMHO) and is not going to make plays on the ground. You may be better off trying to trade Marshall or Jackson plus BGE for an upgrade at RB and a downgrade at WR.
Overall, I think you did a good job. You should have a chance at the playoffs and even the champioship if things go right.
Please take a look at my league if you have a minute. Would really appreciate your opininon.http://www.fantasyfootballcafe.com/forums/viewtopic.php?t=495050