I got on the boards to ask this same question haha. Newton was friggin impressive and should be added on potential alone... My head says go with Henne tho... Or Grossman.... maybe both??? If you go by SOS Miami has the easiest QB schedule for the year with Washington at 4. Carolina is 25th, still don't believe in Newton despite the great QB play.
Eastmont League 10-3 (2nd Seed) Wenatchee League 9-4 (2nd Seed) Urine Trouble League 6-7 (6th seed boooya!!!)
I'd keep Cassel, but drop Peyton for one of the three. I myself am in a similar situation in one league where I have both Mannings, but I'm going to hold onto Eli to see what happens and pick up someone else. Also, personally, I'd have Fitzpatrick > Grossman, but I'm not sure where I'd rank him amongst Newton or Henne right now.