Know this thread is a bit dated, but just thought I would comment as I have the Jesse Bags for my DL650 Vstrom and they have been great. Have dropped the bike on gravel logging roads twice and in the driveway once (I know - I am a bit of a clutz) and they are tough.
They have some nice features on them as well, like the little extra bit that wraps under the frame to put the heavier less frequently used items (like tools) to keep the centre of gravity low and to the middle, as well as the 10 litre storage area under the flip out lid that have compression wire that hold everything in place. As, the fold out lid, that opens away from the bike, makes a handy work area as the open 180 degrees to make a small table area.
The flip out top with the 10 litre storage area also means you have the capacity you desire, but have it broken down into two sections so you can get to the bottom of the panniers a bit easier.
I use simple resuable (green) grocery bags with the two handles to hold several smaller stuff sacks (like "granite gear" bags) for easy removal of everything if I want to leave the panniers on but take things out easily.
The built in locking clasps front and back work well, (save you having to have a padlock that flaps around) and the overlapping lip seal works well with no water getting in at all. I live in British Columbia on the West Coast, and it does rain the odd time here.
Not sure how the new series work for the BMW F800, but can attest that the product they make sure seems to work well and stand up taking a fall.
Not sure if that is any help to anybody, but thought I would just let folks now that the Jesse Bags seem to have some pretty good features in them.
As a side note, my buddy has the Vstrom DL1000 with Happy Trails aluminum panniers of the same size. But they don't have the top flip out lid with storage, and they have clasps you have to use pad locks on. Overall the panniers seem to be very similar, and am sure they are just as tough, but for virtually the same price, the Jesse's seem to have better features.