ftbt, Congrats on getting your can. Welcome to the "watchful waiting" club.
I was going to get a dedicated 5.56. But, upon further inspection of the best and most popular in class (the Surefire), I think I'll save my pennies and continue to use my SilencerCo Omega and Hybrid for that duty. The only real difference is the length, and that isn't much.
BTW- Where did you buy the Omega 9K? Silencershop?