I use the Lowepro Dryzone Rover -backpack.
The waterproof bottom-half takes easily M7II+43+80+150 set inside it with some film etc. The top half is not too big, but takes some spare clothes etc. for a few days trip.
I guess this is not your choice, samm, if you want the most compact case possible to store only the camera. But if you are like me and like to carry also some spare clothes (if it just happens that the day out turns out to be longer than planned) and valuables that i wouldn´t like to leave at the hotel, it´s a good choice. The Rover also protects the camera gear really well, imo.
I also use it when sometimes cycling with M7II, then i of course only have one lens with me, it´s not nice to carry a heavy backpack when cycling. You can also carry a tripod with the Rover, but in that case you´d better have some stuff in the top-half too. Otherwise it´s not that well balanced, and the tripod might bang on your head...
To make this backpack better i would like the lower half just a bit smaller and top half that much bigger.
Niko