Should I trade Brandon Marshall for Matt Ryan?

I have Schaub as my primary QB right now, Orton on the bench. I like Ryan, but I don't want to give up Marshall if he explodes for 13 TDs after being traded or something. I already have Fitzgerald and Smith (Went heavy after WRs) They will fill the 2 WR spots and I have 1 RB spot and another RB/WR flex spot that Marshall could play in, I have Julius Jones, Pierre Thomas, Run DMC to fill the flex spot in most cases. I will definitely dump Orton if I make the trade though.