I have found this thread quite interesting! (despite the usual forum bickering).
I had a minor neck injury this week, at slow speed, which had our friendly neighbourhood off duty paramedic call 999, i got collared, back boarded, and specialist 6x6 ambulance off our little hill and given a once over in A and E, to find no fracture. Followed by lots of mockery by my mates for wasting money. I only ride in shinnies, Full face, 5/10s and gloves.
I had gone over the bars and cartwheeled, catching my helmet clad head on the way through and had instant pain and discomfort. (i am not usually one to make a song and dance about injury).
This incident has made me really consider a neck brace now as i consider being able to ride more important than anything else! So a neckbrace seems a good idea to me.