I played 3rd Edition back in the olden days(none of these newfangled Dark Eldar, Tau, or Necrons). I have bought a Space Marines codex and am a bit lost with the rules changes. Since my only potential opponents are whatever middle schoolers want to teach me a terrible lesson at the local Games Workshop store, I don't think I need the full 5th Edition box of templates and dice and such. Is the rulebook in the Assault on Black Reach set sufficient to teach me the basics of 5th Edition? The Black Reach set costs only $10 more than the Rulebook according to the GW website, but I get a Dreadnought and some tactical space marines that don't all look exactly the same. That'd be nice I think. Do I really need to read the full rulebook to know what's going on or what?