Good morning, Im interested in buying my first AR. Primary use: Shooting range 50-300yds. Family use, introduction gun to rifles. Once a month, approx 200 rounds a trip. Options: .223, because ammo is less expensive; 16" Bull Barrel SS, flat top so I can mount a scope. Direct Gas Impingement, a forearm that I can mount a bipod too. So I've looked and researched, researched and looked...and I've come to like the DPMS Panther Bull Sweet Sixteen. It has a great price point ($1000), basic setup. I can modify items (stock, trigger, grip) later once I get a feel for the rifle. Another rifle i found was from American Spirit Arms 16" SS Bull M4 with a flat top. The magazine review I read was impressive, but it is more expensive. Last is Rock Rivers LAR-15 Fred Eichler. I like the features and options, but don't like the paw print outlines on the forearm. Not sure what they were thinking. Ok, the wife said it was cute...come on now! I plan to mount a Nikon M-223 3-12x42 scope I've never used these companies products or interacted with them. What advice can you give about these companies? Any help is appreciated, thanks.