The OP should have the best education to make up his mind and there truth is there is a "WORLD" of difference between DPMS and Colt. Night and day, quality-wise.
Not to argue with you but the OP should have the truth, not just a well intentioned opinion. With that, I am out.
ETA: Go to M4carbine.net and check with the industry pro's on their opinions. They will mirror what I am saying.