Honestly, we just got the 2012 Reflex Rail at the Shop, and they are worth it, NT Feedneck, NT ASA, Updated Board, 2 Piece Barrel. It comes with everything you need.
Now the Rails, $245 right?
TechT Bolt - $80
Better Barrel - $50-$80
Macro-line & Fittings - $13
ASA - $40-$60
All items found on ANSGear.com
Final Tally - $453 Rough Estimate without shipping costs.
I can't tell you what to get, neither can anyone else, but I can tell you what it will cost you.