That seems like a nice cover, but I'm looking for the "ultra portable cover". I want one that takes up the least amount of space so I can take it with me on the road. I think Geza fits that requirement.
I have the Pro-Series Geza in Medium. It tucks up pretty small, fits in my tankbag, and comes with a mesh stuffsack. It does not fit over a FJR with saddlebags or a topcase. Reportedly, the large will fit the FJR with saddlebags, but I'd contact Gaza and ask about your topcase. The Dowcos are nice, but are just enormous. They take up a whole saddlebag.