I think the key is separation.
Qb you have Brees, Brady, Rodgers and P.Manning again all very close.
then right behind them are Ryan, Cam Newton, Luck, RG3
then the next tier of Romo, Dalton, Wilson and co. aren't that far behind.
so yes, I think you can wait at Qb, and spend the top two rounds on some combination of Wr/Rb or Wr/Wr.