If I was looking for an AR that I could stake my life on, I'd go Colt, specifically the model 6920. Pretty close to your price range and adheres to the military's Technical Data Package (TDP) for their rifles. This rifle, short of the barrel length and fire control group, will be identical in appearance and quality checks to the military's M4 issued carbine. Most ARs will appear the same in quality till you start to investigate the details.
Properly staked carrier keys, chrome lined HPT'd bore & chamber, "F" marked front site bases (for M4gerys), HPT'd bolts (not just batch tested), M4 feed ramps, staked castle nut, etc.,
Spikes, BCM, CMMG, Daniel Defense also make excellent rifles close to your price range.
ROCK6,
Very nice collection!!!
How is the accuracy shooting .22lr conversion with the factory barrel twist? I've been debating between a conversion kit or a dedicated upper.