If you're going to shoot thousands of rounds thru your AR, might as well go with Colt.
If you're ever going to have to sell your AR, might as well go with Colt.
If you're going to obsess over spending a couple hundred extra dollars, better go cheap. Sometimes you get what you pay for, sometimes not, but when you buy the top brand it comes with a name that's been in the business for over a century, and that has defined its niche in the market place. That actually does count for something; in this case, about $300.
No sense fighting it; go with your gut and do what makes you happy. Buy once, cry once.