What is the intended purpose of the firearm? What features would you like to see in the rifle?
Thanks everyone for the reply thus far... It has been an education, and some great sources.
To answer the quoted question, this is going to be used alomst exclusively for range-shooting only.
Features are basic for now... I would prefer tactical rails over the standard heat guard for future upgrading, but thats about it to start. In a perfect world where I have discovered how to turn crap into gold, I would put either a vertical grip or bi-pod on it, and a nice ACOG scope... and maybe a flashlight just so it looks cool, but the cost on those would probably run the same as the rifle itself.
I dont believe hunting with an AR is legal, so range shooting would be it.