Thanks Mike.
I think I did actually see one of those backpacks, but it's not quite what I was after, seeing as I need hiking + photography at the same time 100% the time, not one or the other, and it is more "brick shaped" than I was after (personal preference).
I have ended up buying a LowPro Primus AW. I bought it last thing yesterday and hadn't got back to the forum until now.
Having the Primus at home and fitting my gear in it I am more happy with it now, I think it will work well until they bring out a new improved version in a couple of years
I will be registering with LowPro and telling them about the various thing I think they did wrong with the bag, as they do request feedback.
But, all in all, considering pros and cons, I think the Primus will be quite good for my travelling and hiking over the next couple of years. Time will tell