I also just bought a RRA complete lower with 6 position stock, and I am in college too. We should keep in touch and see how both of are rifles turn out. (I'm getting a degree in Law Enforcement Justice Administration from Western Illinois University, I'm in my last class currently). I think im going to go with a 16'' A2 or A3 upper with a mid length foregrip in a quadrail. I want to have iron sights first, and see if i want to put optics on later. I want to be able to accesorize easily in the future so I am going to spot for the quadrail off the bat. I want to put a light on it for sure. I also want the mid length foregrip to get a longer sight radius, and also a bayo will fit nicely for shits and grins. Im looking at the RRA uppers now. lucky me, I work with an FFL class 2 dealer, and he gets me anything I want for 5% over cost, even then things are pricey.