The RAWA is great for adding later. I bought mine off of eBay, brand new, with camera box for $53 shipped to my door (Just thought I would throw that in there, haha)
I was 15 jumps in at that point so I drilled the rivets out and removed the box. Then I grabbed a Liquid mount when I was ready to add video. I have since added a RAWA box to the side and use the top mount for stills.
Super easy, you won't tire of this helmet. Adding on later is super easy. But I wouldn't just add an empty box....why have the liability without the benefits?