I'm looking at buying my first AR platform. I primarily want it for target shooting, varmints and as a possible duty gun when I get on as a Reserve LEO. I want to stay away from DPMS and Bushmaster as some of the reviews I read haven't been too favorable. My price point is $1,000. I've read some good things about Stag and Rock River or would I be better off doing a build? Any advice would be helpful as this would be my only AR purchase.