Stylish, comfortable rucksack-is it out there anywhere?

[SaltNSauce]

Having a bag crisis at the moment partly because the 4 yr old is not using a pushchair very much now and I find that I having to carry masses.
So I ditched my tiny practical across the body and got a Boden satchel. It nearly killed me with the weight even before I put anything in it.
I got a Cath Kidston fabric across the body which is lovely and light and fits loads in. However not only have I seen that every woman in the playground has one, two or three in the same pattern as mine, but my shoulder is aching permanently as a result of the amazing capacity of said bag.
I am trying to train the children to carry all of their items but it's a life's work really.
So I thought backpack. Backpacks are either sensible, comfortable and not stylish or stylish but with straps like string which cut into the shoulders and an opening that invites thieves to dip in. Or are they?

Nettles is that Cos in Greece?

Meggles Damn iPad spell check!

Sparkle I could,t link to the site you posted earlier but just managed to have a look and have put a Dakine one in my basket. They take Paypal too.
Not madly attractive but not hideous or too "hiking" either.

What about this It ticks most of the boxes for me except it has just one across the body strap.