Get an Aimpoint if you want the peace of mind. $360 for a new PRO most of the time, $325 is not unheard of for a used Micro, and even cheaper for a used Comp M2. They have the strength and the battery life.
Nothing wrong with a TRS25, PA Micro/30mm, or Vortex SPARC or Strikefire, but they lack the durability and battery life that make Aimpoint the standard. If you are realistic in your expectations, and only see yourself plinking, the Vortex Strikefire I or II, SPARC I or II, or PA Micro would be the three that I'd recommend.
Personally, I think you've got a good quality AR and good quality sights, so it makes sense to put a good quality optic. I'd start dropping some spare change in a jar for a used Aimpoint. Nothing wrong with using irons until then.