Regarding the blackrapid, those have always scared me, the thought of me swinging around quickly and having the lens smash into something. Are the strap lengths able to be shortend to have it more at chest level so there's not so much room to swing?
The BlackRapid straps have clips that work as stoppers. So you can position the camera to remain anywhere on the strap. I have one set at the bottom so the camera doesn't go any further back than right at my side. And I find I spend more time with my hands on my camera every time I bend over with a neck strap that I ever do with my BR. And it's more natural for me to just keep my right hand gently on my camera body as I walk around with it hanging at my right hip. I love it and will never go back to a neck strap.