+1 to the Seahorse cases.
I bought a pair of the Seahorse 720 cases and mounted them on a SW Motech quick release-able rack system. They are much slimmer than running even a pair of Givi E36 cases (which I also have for it). These cases are mounted using a set of Happy Trails pucks, though I find that I pretty much always just leave them on the bike.
I also have a cheesy JC Whitney Trunk that snaps onto the Givi mount plate that you can see in the above pictures. To make the JCW trunk a bit more palatable I fitted the center lens with a zippy V-strom logo. It's just a piece of paper under the red bezel with the logo laser printed on it. ;-)