I have a quick question on AR-15 optics. I have a nice new flat top AR with folding front and rear sights. I would like to put a good red dot/holographic sight on it, but I dont want to spend too much money. I have narrowed it down to these: Aimpoint ML2 for $395 and EoTech 512 for $410. Any suggestions? Also, it seems that there are a lot of cheaper red dots, but I dont know if these are reliable/good quality enought to put on a home-defense gun. If anybody has a different red dot suggestion that is cheaper, that would also be appreciated.