These are the parts I have for my RS so far. The packaging on the Cane Creek headset says IS-2 but it's actually an IS-6 inside, which is what I ordered.
Aerus C4 carbon bars 44cm (the screwdriver is to keep the bars from rolling over)
Cane Creek IS-6 headset
Easton EC70 carbon post 300mm
FSA K-Force stem 130mm