I just bought a Vortex Crossover 2MOA Red Dot. I did so after some research. The battery life is 50,000 hours set at the mid range of brightness. Is priced in the US at around $149US , $199 Cdn), The latter is what I paid. Mounted it allows for co-witnessing on my Evo Carbine. I plan to use my Evo playing IDPA PCC. The Vortex has a no BS warranty up here which has proven to be outstanding. If it breaks or fails they replace it no questions asked.
Is it a sight I would mount on an AR and rush off to war...probably not. For playing IDPA or home defense I dpn't see higher priced Optics doing anything more for me than what the Crossfire will do.
Take Care
Bob
ps The chance of me requiring a carbine/pistol for home defense is Slim and none and Slim just left town.