I am wanting a great all around rifle, and found a new love! I have discovered how shooting relieves alot of stress, and now I have a use for my five acres of un-farmable land! A gunrange!!!! Ok, here is what I am going to be doing: Target shooting, coyote hunting, prairedog killing, and screwing around. I have chosen the .223 round for a couple of reasons. Cost, and availability are the main reasons, but other than that, its offered in alot of rifles, mainly tactical/assult style. If I go with the Armalite, or bushmaster it will be the 16" barrel ar style, if in the sig the new 556, & if I can find one the hk416......... What are your thoughts on an all around rifle for home defense and playing with????? Please stick to these choices as they are all locally available (except the hk416....do you know how to get one???), what do you think I should get and why?????