I would go for the SLR one. I picked one up on Amazon for about £7. It was a great buy. I use it on my d3100 with 55-300 lens. I let my camera drop out of my hand knowing the strap with hold.
Metroman this is the one i got from Amazon.
http://www.amazon.co.uk/gp/product/B00137NMMW/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1
I have one of these and am very pleased with it although I haven't used it much yet. They are difficult to put together. I thought it was just me, I can't bear those graphic how-to-put-it-together instructions. An essential part of the strap is hidden inside the leather part and can take a bit of finding and extracting, and you need to work out which way is up. After that, and a bit of further adjustment you are ready to go.