I really want an AR-15 and have for a long time. I have decided that I am going to start lobbying my soon to be wife to support me buying/building one. So as a first timer to the AR-15, should I build one or buy one? I am pretty particular in what I want and don't want to, for lack of a better word, raped in todays market. I am extremely competent in mechanical items and building an AR-15 does not scare me so long as I find a barrel already attached to an upper receiver (don't want to worry about headspacing). I want a M4 style, 1x7" twist chrome lined, quad rail up front, most everything else standard. I have found most of the parts online in stock if I look hard enough and it looks like I could build one for ~$1000. So suggestions?