I am buying an entry-level AR-15 today, this will be my first time ever dipping my toe in the AR-15 pool. A local gun store has a new S&W Sport II for about $650, Cabelas has Ruger AR-556's for about that much, and Sportsmans Warehouse has a DPMS on sale for $549. If I went with the S&W or Ruger, am I paying the extra $100 for a brand name only, or are they better quality than DPMS?