I have a DPMS "Panther-Lite"; 16" barrel, 1:9, flat top bare-bones configuration. I paid $803 OTD in Nov. for it new. So far I have put probably close to a thousand rounds through it without a hiccup, subjected it to snow and single digit temperatures, cheap ammo and plenty of mag dumping.
No hiccups whatsoever, period.
edit: Only gripe is the trigger. It could be smoother, but meh. It doesn't bother me enough to fix it.