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And regarding all the after-market toys-I would cook on the BGE for awhile before deciding what you want/need. Hit the search feature here and you can find many quick and inexpensive ways to make a raised grid.
About the only real thing you should have right out of the gate is a good "quick-read" thermo. Thermopen is the flavor of choice, pricy but worth it. FWIW-
Here's a link to a great pulled beef recipe-I do not go thru the sauce drill but the chuckie cooking plan is great: http://dizzypigbbq.com/portfolio/clays-pulled-beef-by-clay-roberts/ For your chuckies I would figure around 5 hours or so total cooking time but that can vary by each hunk. Just give yourself plenty of time.