These bags are velcro strip on top and two bungees. Off and on in seconds and they hold a lot. Cheap on ebay when you can find them. Added plus is theyre Buell badged bags so people can infer you have two discontinued machines.
Those sound like a perfect fit then, and I like the easy on and off idea. But I just can't bring myself to buy them when I already have 3 other bikes already set up with cases.