Looking to buy a cheap new AR-15. Won't be shooting it regularly (hopefully never) so don't need anything fancy. Only thing I can find locally is an S+W for $870. Online I found an Olympic Arms K3B for $712 and a Doublestar DS4 for $739. I imagine the S+W would be the highest quality, but since it won't be used much, just want something reliable. Anyone have experience with any of these? Other suggestions would also be appreciated. Thanx much in advance.