I'm also looking at soft luggage options. But, as soon as I saw the term water "resistant" I lost interest in these and closed the window. For the relatively high price - asked, there is really no excuse. They should be water "proof". What you are getting is a bag that requires another bag. And to me that's just silly.
I will, more than likely stick with my plan "A" and go for an Ortlieb rackpack. I can live without the external pockets.