Nice rifle! I'm sitting on the same thing myself. It's beet very accurate, and a whole lot of fun. I got the same tactical carry handle that you have on yours. I put an Aimpoint on it and the setup is perfect! It raises the Aimpoint just high enough to be able to see over the front site, but not so high that it's uncomfortable to shoot or goofs up your cheek weld. If something goes wrong with the Aimpoint, the irons can be used instantly through the Aimpoint. To me it seems like the ideal solution for someone who is using an Aimpoint, though as I understand it, the Tactical Charging handle pretty much restricts you to an Aimpoint. Won't work with an ACOG or Holosite.
I too went with an IBZ, but I decided that I'm going to re-zero the irons to a standard Army/USMC zero. This way I will have the Advantages of the Aimpoint at closer ranges, but the advantages of the irons with the calibrated range settings with the rear elevation dial. Maybe I'm just screwed up, but I find that my groups are tighter with the Irons, so it makes sence for me to stick with them for the longer range shots.
Also, nice range setup!
-K