LLoyd; I totally agree with your premise. And in today's dollars, there's absolutely nothing wrong with buying a DPMS, RR, etc... for $650. The only two problems SOME PEOPLE HAVE, are:
1. Colts, Nov, LMT, BCM, etc... DON'T have to cost $1400. You can get them or build them for the $800-$900 range if you're lucky, and $900-$1000 fairly common.
2. Many people WON'T shop around and pay $650 in today's dollars for DPMS, S&W, Rock River, Bush, etc... They are impatient. They will buy it locally, at the local price, and pay the SAME EXACT $900-$1000 that they could have paid for the AR that You Yourself just said had some "BETTER PARTS" in it.
I agree: You don't need to spent 2-3X more for the "Colt, LMT, BCM" over the others. But if you shop around, you don't have to pay that much for those better makes. The NORMAL price of my S&W M&P15 was $949. "Suggest retail was $1049". Would I spend that much on an M&P15? Hell no.!!! For that price, I could have gotten the Colt or the BCM. However, I shopped around and was patient. There was a 3 day Christmas Sale at Sportsman's Warehouse. "Local Big Box Store". The $949 M&P15 was on sale for $200 off. ($749). Plus, there was a military appreciation sale by S&W and it gave me a $100 rebate. So, I got my S&W M&P15 for $649. So yes, I'd buy the M&P for $649 over a $900-$1000 Colt or BCM.
The problem is, people are impatient, they buy on the spur of the moment, and they rationalize. Take away ALL THE MONEY ISSUES. The DPMS, Bush, Rock, etc... are NOT AS GOOD as a Colt, BCM, LMT, Nove, ect... However; MOST of the things that make the Colt, BCM, LMT, Nove, etc... better, aren't really that important to the "Average" AR15 owner/shooter. Now; put money back into the equation, and you come up with certain facts.
1. If you spend $1200-$1500+ for the normal colt, BCM, LMT, Nove, Daniel, etc... then you spent way too much. You're only going to rationalize. I'm not talking about after adding EoTech and other accessories. I'm talking about the Basic Rifle. You Can buy/build these at the $900-$1000 mark from numerous places.
2. If you paid $900-$1000 for a DPMS, Rock River, Bush, S&W, etc.. then you spent way too much. You're only going to rationalize it. You could have spent the exact same amount on a better rifle like a colt, BCM, LMT, etc... Maybe you didn't want to order online. Maybe you are just impatient and wouldn't wait for a sale. Either way; you paid too much for it. But definitely don't think it's the same quality as the Colt, BCM, LMT, etc... It's NOT!
3. If you spent in the $600-$750 range for your DPMS, Bush, Rock, M&P, etc..., then you did really well for a weapon for the average owner/shooter. I say average, because chances are you're not going to be shooting 5,000-10,000 rounds a year; you're not into the big carbine classes; you're not into the major competition and marksmanship events. You want a rifle for target practice, plinking, fun, some prairie dogs and varmints, and possibly home defense. EXCELLENT CHOICE. But again: Don't try and rationalize your $650 DPMS or Bush as being the same quality as the Colt, BCM, LMT, etc... It's not. And that's coming from the person who bought the $649 M&P15. Love the gun. Great price. Well worth it. But it's not the Colt, BCM, etc... And I personally consider the M&P15 a little different. It is actually a bit higher quality than the DPMS, Bush, RR, etc... And I DO SHOOT 5,000-10,000 rounds a years through it. But I know what issues could happen. I won't rationalize that my M&P15 is as good as the BCM or Colt. But it is better than the RR, Bush, DPMS, etc..
4. If you are into the 5,000-10,000+ rounds a year; carbine classes; playing war games; marksmanship and competition events; etc... then you really shouldn't be looking at the DPMS, Bush, RR, etc... You really should be looking at the Colt, BCM, LMT, etc... Now; with some shopping around, you can get the excellent base models in the $900-$1000 range. Of course, all the add on accessories is another story. That's the same for all weapons. I will NEVER buy a fully decked out weapon for those $1400, $2500+ range. You pay ONLY for convenience. You can buy all the same accessories as the fully decked out version, and have your TOTAL price at the $1500 range compared to $1800-$2500.
So for the basic models; not counting accessories;
1) Buy/build the colt, bcm, lmt, etc... in the $900-$1000 range. Anything more, you paid too much. Don't rationalize what you spent. You spent too much.
2) Buy the DPMS, Bush, M&P15, RR, etc... in the $600-$750 range. Anything more, you paid too much. Don't rationalize what you spent. You spent too much. AND: Don't rationalize that it's the same quality as the Colt, LMT, BCM, etc... it's not.
HOWEVER: It can Definitely be "JUST AS GOOD AS" the colt, bcm, daniel, lmt, etc... for what YOU WANT and NEED IT TO DO!!!! That's what is important. For me, my M&P15 is "Just as Good as" the colt, BCM, etc... for what I want from it. I am not into the marksmanship, carbine classes, war game training, 300+ yard shots, etc... For plinking, varmints, targets, fun, and home defense; it's fine. But I won't rationalize that they are the same quality. A Ford Focus and a Porsche are NOT THE SAME QUALITY!!! But for my USE/NEEDS, "Driving inner city only", the Ford Focus can perform "Just As Good As" the Porsche.