I think there's about 2000 threads covering this exact topic. Sure, DD makes a great rifle, but what's your budget? What's your experience / skill level with AR's? Why do you like DD? What's your intendedi use?
If the price is good for you, go for it. You'll be happy with your rifle. If it's your first AR, go cheap, buammo with the $$ you saved and learn your rifle and how to shoot it well.
I don't agree with 'cheap' as a good starting point. There is what. , 200$ difference between a **** AR and a colt 6720/6920, and if OP wanted to keep it, he'd have a better rifle to build on. If OP wanted to sell it, he'd still have something worthwhile on the market in a used colt, DD, BCM.
Ammo costs are the same and extras (sling, light, aimpoint) can move from rifle to rifle and still hold value.
Colt, DD, BCM aren't the cheapest, but they aren't that much more in the grand scheme of rifle ownership. Buy once cry once applies.
Edit: spelling errors due to phone
I .
I agree with you by the way and you made a good point right off the bat. What's the price difference between a Colt and a DD? Significant from what I've seen.