Looking for complete AR15 upper

[Matt G]

So this thread has really sparked my interest in getting an AR for a "graduation present" for myself. The rifles I have been looking at were in the $1,000 -$1,500 range. However, reading here and doing a little research I realized I could build 2 for that price (one for the wife too). A friend of mine picked up a DPMS Panther 5.56 Oracle at Cabela's last week for just over $600. My question is, should I try and build a budget rifle or just go pick up the DPMS? It's nice, but HEAVY!! I was figuring that the poly LW-15 lower would help drop some weight on it.