Congratulations, my friend.
There is no better feeling than getting a new and wonderful Smith & Wesson M&P 15.
Your MOE is a GREAT carbine and she'll give you lots of years of excellent service. The LaRue mount and Aimpoint are absolutely first-class, too. I have the same rig, only with an Aimpoint T-1 in a LaRue mount.
My best wishes for lots and lots of fun with your new AR.
God Bless,
Steve