That's a very impressive break down of what is here and what may be coming. I wish I knew more about some of the weapon systems to comment further.
One thing I will say is that you won't have to wait long the have the 'Sig Sauer' name printed on the side of the 556. As of October 1st, 2007 the US company SigArms no longer exsist. They have changed their name to Sig Sauer
Enjoy!"SIGARMS® CHANGES NAME TO SIG SAUER®, ALIGNING COMPANY WITH GLOBAL BRAND".